SSL2109 数据手册 用于 LED 照明的控制器 版本.1—2012 年 1 月 10 日 1. 概述 SSL2109 是一款高压集成电路,在一般照明应用中,用于驱动 LED 灯。 这款芯片的主要特点包括： • 小型印制板（PCB）封装，提供非常紧凑的解决方案 • 高效（最高达 95 %） • 易于集成和多重保护特征 • 电子元器件少 该芯片是 SSSL2108X 系列的扩展,但是没有内置开关器件。该芯片驱动临界导通模式降压变换器。 该芯片可以通过一个内部高压电流源从 HV 管脚直接启动。在启动后，从漏极处通过电容耦合的 dV/dt 供电，或者任何其他辅助电源为芯片供电。这个功能在应用设计中提供了充分的灵活性。 内置钳制电路用来限制供电电压。该芯片提供了高于 5 % LED 电流精度的精确输出电流控制。它 可以实现脉冲宽度调制（PWM）调光，并且有多重保护，包括 LED 过热保护。 2 特点和优点 LED 控制芯片从整流电源驱动 LED 灯串或高压 LED 模块 是高效开关模式降压驱动器产品系列之一 高效节能的临界导通模式运行的控制器： 续流二极管中无反向恢复损耗 零电流开通 零电压或波谷关断 所需电感值和尺寸最小 允许直接 PWM 调光 通过逐周期地电流控制实现快速的瞬态响应： LED 电流中 AC 电源纹波小，并且总电容值最小 LED 电流中没有过冲 LED 正向电压无需冗余 内部保护： 欠电压闭锁 (UVLO) 前沿消隐(LEB) 过流保护(OCP) 短路保护 (SWP) SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 内部过热保护 (OTP) 低压保护 输出短路保护 (OSP) LED 驱动方案的元件数少（见图 3）： PWM 调光不需要调光开关和上桥驱动 采用单个 NTC 实现简单的外部温度保护 可选软启动功能 在待机状态时与内置指示灯的墙上开关兼容 芯片的寿命匹配甚至超过 LED 灯的寿命 3 应用 SSL2109 专为在单一市电输入电压下带精确恒流输出的紧凑型 LED 灯设计，而不需要电流隔离。 电源输入电压包括 100V，120V 和 230V（交流）。可以用 PWM 信号调制输出信号。功率范围 由外部其器件决定。 4 快速参考数据 表 1. 快速参考数据 符号 参数 条件 VCC 电源电压 I ccint 内部供电电流 典型值 最大值 单位 9.5 - 15.5 V 正常工作 压 管脚 DRAIN 上的 VDRAIN 电压 fconv 变换频率 ton ( high ) 管脚 DRIVER 上 I DRIVER 电流 A 1.3 管脚 HV 上的电 VHV 5. 最小值 600 V 600 V 25 - 200 kHz 12.5 15- 17.5 s - 1 A 10% -0.4 订购信息 表 2. 订购信息表 型号 SSL2109 SSL4101T 初步数据表 封装 名称 描述 版本 SO8 小型塑壳封装；8 脚；本体宽度 3.9mm SOT96-1 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 2 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 6. 模块框图 7. 管脚信息 7.1 管脚 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 3 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 7.2 管脚描述 表 3. 管脚描述 符号 管脚 描述 HV 1 高压供电管脚 VCC 2 电源电压 NTC 3 温度保护输入 SOURCE 4 下桥外部开关 DRIVER 5 驱动输出 DVDT 6 AC 供电管脚 GND 7 接地 DRAIN 8 上桥外部开关 8. 功能描述 8.1 简介 SSL2109 是一款应于可替换小型 SSL 灯和独立的 LED 驱动器的芯片。 8.2 变换器运行 SSL2109 变换器是工作于临界导通模式且采用峰值电流控制的系统。基本应用电路图如图 3 所示，波形如图 4 所示。这种类型的变换器工作在连续和非连续模式之间的临界状态。每个周期 开关开通期间，能量储存在电感 L 中。当 MOSFET 开通时，电感电流 I L 为 0。此后，电感电流 IL 从 0 开始增长，其幅值与 Vin-Vout 和 MOSFET 的开通时间成比例。当 MOSFET 关断时，电流通过续 流二极管和输出电容续流。然后电感电流以与 VOUT 值成比例下降。LED 电流 I LED 几乎等于开关 电流峰值的一半。只要电感电流 IL 降为零，一个新的周期就将开始。 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 4 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 8.3 变换频率 变换频率必须限制在 200kHZ 以下。因此，在给定电源电压和 LED 电压和元件拓扑的情况下，需 要选择一个适当的电感值保证变换频率在规定范围内。 8.4 Driver 管脚 SSL2109 配有一个外部驱动器，用来控制外部开关。在第一个周期（t0 到 t1）期间，Driver 输出 管脚上的电压逐渐增加到 Vo ( DRIVER )max 而使开关开通。从副边开通直到下一个周期开始（ t0 到 t00 ），driver 输出管脚上的电压逐渐下降到 Vo ( DRIVER )min 。在管脚电压从低到高再回到原始值 的转变过程中，开关沿的陡度得到控制。这个控制条件抑制了电路对周围环境的高频辐射。 8.5 波谷检测 当原边开关开通的时候，一个新的周期就开始了（见图 4）。从 t1 时刻开始，当 SOURCE 管脚上 检测到峰值电流时，开关关断，副边在 t2 时刻开通。在 t3 时刻线圈电流等于 0 时，副边工作结 束时，漏极电压开始在大概 VIN VOUT 范围内震荡，其峰峰值等于 2 VOUT 。在 SSL2109 电路中 集成了波谷检测这个特有的功能。DRAIN 管脚上接有专用的内置电路，用来检测开关漏极上的电 压的最低值。下一周期在 t00 时刻开始，这样可以减小容性开关损耗。检测波谷时，如果振荡频 率和电压变化都在规定的范围内（ f ring 和Vvrec (min) ），检测结果才会被接受。 Vvrec (min) 是 HV 管脚和 DRAIN 管脚上的电压差。如果没有检测到有效的波谷，副边将会继续导通进行直到达到最 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 5 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 大的关断时间（ toff ( high ) ），然后开始一个新的周期。 8.6 保护功能 该芯片有以下保护功能： • 欠电压闭锁 (UVLO) • 前沿消隐(LEB) • 过流保护(OCP) • 内部过热保护(OTP) • 低压保护 • 短路保护(SWP) • 输出短路保护(OSP) • NTC 过温控制和保护 SWP 和 OSP 是闭锁保护。这些保护功能使芯片停止工作直至重新复位（能量循环的结果）。当 Vcc 降至低于 Vcc ( rst ) 时，芯片复位闭锁保护模式。内部的 OTP 和 LED 过温保护是安全重启保护。芯片 停止工作，导致 Vcc 降到低于 Vcc ( stop ) ，从而使芯片重新启动。只有当不存在故障时，芯片才能正 常工作。 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 6 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 8.6.1 欠电压闭锁 (UVLO) 当 Vcc 管脚上的电压降低至低于 Vcc ( stop ) 时，芯片停止工作。然后通过从 HV 管脚给 Vcc 供电来尝 试重启芯片。 8.6.2 前沿消隐 (LEB) 为了防止短路保护或过流保护的误触发，在开关开通后引入了一个消隐时间。当内部 MOSFET 开 关开通时，由于漏极和源极之间的电容放电会引起一个短路电流尖峰。在 LEB 时间（ tleb ( ocp ) ） 期间，这个尖峰可以忽略。 8.6.3 过流保护 (OCP) SSL2109 内置一个高精度的峰值检测器。当管脚 SOURCE 上的电压达到 Vth ( ocp ) SOURCE 时电流检测 器触发。通过接在 SOURCE 管脚上的一个电阻可以检测流过开关的电流。在 LEB 时间 tleb 后，检测 电路激活。由于 LED 电流是峰值电流（设计）的一半，因此在运行时自动提供最大 LED 电流保护 功能。过流检测和开关实际关闭之间有一个传输延时 td ( ocp swoff ) 。由于这个延时，实际的峰值 电流比由 SOURCE 脚上串联电阻设置的 OCP 电平稍高一点。 8.6.4 过热保护 (OTP) 当芯片达到某一温度 Tth ( act ) otp 时，内部 OTP 功能触发，此时变换器停止工作。当芯片温度降低至 低于 Tth ( rel ) otp 时，OTP 安全重启保护功能和芯片将会再次重启。 8.6.5 低压保护 当输入电压降至接近于输出电压时，低压保护将限制灯的输出功率。由于输入功率必须保持恒定， 因此输入电压降低，输出电流将会增大到一个输入电路无法处理的程度。SSL2109 有一个开关最 大导通时间限制 ton ( high ) 。在开关导通阶段，线圈中电流的上升速度与输入输出电压差成比例。 因此，在 ton ( high ) 之前达不到电流峰值，从而降低了 LED 的输出电流平均值。 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 7 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 8.6.6 短路保护 (SWP) 如果流过 MOSFET 和接在 SOURCE 管脚上的外部电阻的电流急速上升，SWP 激活。在续流二极管短 路时，这个电流就会出现。此外，在电压输入端和 DRAIN 管脚之间有非常小或被短路的电感时， 这个电流也会出现。在 LEB 时间 tleb 后，SOURCE 管脚上的电压高于 1.5V 时，触发闭锁保护。此 外， Vcc 降至低于 Vcc ( rst ) 时，芯片就重置闭锁保护模式。 8.6.7 输出短路保护 (OSP) 在副边导通（开关时间）期间，如果在关断时间 toff ( high ) 限制范围内没有检测到波谷，那么输出 电压将会低于应用中所允许的最小值。这种情况会出现在启动期间或者存在短路时。当检测到 toff ( high ) 时，定时器启动；只有在以后的某个周期中出现有效的波谷检测时，定时器才停止工作。 如果在 t det( sc ) 时间内检测不到波谷，那么可以推断存在短路而不再启动，芯片进入闭锁保护模式。 当 Vcc 降至低于 Vrst(VCC) 时，芯片就复位闭锁保护模式。在 PWM 调光期间，OSP 定时器在关断 期间暂停工作。 8.7 VCC 供电 SSL2109 可以使用三种方法供电： • 在正常运行下， DVDT 管脚上的电压脉冲经过整流后向 VCC 管脚供电。 • 在启动期间，有一个内部电流源连接至 HV 管脚。这个电流源提供内部能量，直至 dV/dt 供 电或 VCC 管脚上的外部电流给芯片供电 • 外部电压源连接至 VCC 管脚上 当 VCC 管脚上的电压高于 Vstart (VCC ) 时，芯片启动。当 VCC 管脚上的电压低于 Vstop (VCC ) 时，芯 片闭锁（停止振荡）。启动和停止电压之间的滞环允许芯片由一个缓冲电容供电，直至 dV/dt 电 源供电。SSL2109 内部有一个 VCC 钳位，这是一个内部稳压管（或稳压器），其用来限制 VCC 管脚上的电压在 VCC 的最大值。如果 dV/dt 供电的最大电流减去芯片的电流消耗低于 I DD 的最大 值（主要由门极驱动上的负载决定），那么 dV/dt 供电电路不需要外部稳压管。 8.8 DVDT 供电 DVDT 管脚连接至一个内部单边整流。当一个有足够振幅的交流电压加至该管脚，芯片直接被驱 动而不需要其他外部电源连接。该方案提供了一个有效的方法防止使用调节器给芯片持续供电而 产生附加的大功率损耗。和辅助电源供电不同，DVDT 供电不需要附加电感线圈。 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 8 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 8.9 VCC 调节器 在供电电压下降期间，输入电压会下降过低从而不能提供芯片所需要的流过 DVDT 管脚的电流。 在这种情况下，如果 VCC 电压降至低于 Vcc ( swon ) reg ，将会启动另一个调节器，该调节器产生的电 流可高达 I HVhigh ( oper ) 。该调节器的工作就是补充所需的供电电流来防止芯片进入 UVLO 模式，而 DVDT 供电没有这种功能。当 VCC 电压高于 Vcc ( swon ) reg 时，调节器停止工作。 8.10 NTC 功能和 PWM 调光 NTC 管脚可以作为 LED 过热保护的一个控制方式。此外，通过一个数字信号（PWM 调光），该管 脚也可以作为使能照明输出的输入端。该管脚有一个内部电流源，可以产生一个电流 Ioffset ( NTC ) 。 用来监控 LED 温度的 NTC 电阻可以直接连接至 NTC 管脚。对应于 NTC 电阻值和相应的 NTC 管脚上的电压，变换器的响应如图 5 所示 当 NTC 脚上的电压高于 Vth ( high ) NTC 时，如图 5（4），变换器传送额定输出电流。低于这个电压 水平时，峰值电流会渐渐减小直至达到 Vth ( high ) NTC ，如图 5（3），这里的峰值电流等于额定运 行时峰值电流的一半。当 NTC 管脚的电压超过 Vact (tmr ) NTC 时，如图 5（2）一个定时器开始工作， 造成这样状态可能有以下两种情况： • 如果在时间 ttc ( deact ) NTC 内没有达到低电平 Vdeact (tmr ) NTC 图 5（1），那么检测到 LED 温度过高。 芯片停止工作并试图通过 HV 管脚电压重启。重启只发生在 NTC 管脚的电压高于 Vth ( high ) NTC 时 如图 5（4）。峰值电流的减小不会导致 NTC 温度变低，过热保护功能被激活。 • 当在时间 ttc ( deact ) NTC 内达到低电平 Vdeact (tmr ) NTC ，图 5（1）该管脚可能被外部拉低。不会触发 重启功能。反而，输出电流减小为 0。PWM 调光可以通过这种方法来实现。当电压高于 Vdeact (tmr ) NTC 时，输出电流再次上升。 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 9 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 软启动功能 8.10.1 NTC 管脚可以用于实现软启动功能。在开通期间，NTC 管脚上的电平为低电平。通过连接一个 电容（与 NTC 电阻并联），可以决定一个时间常数。时间常数会使 NTC 脚上的电平缓慢地升高。 当 NTC 管脚的电压超过 Vth (low) NTC 图 5（3）时，变换器以最大电流的一半开始工作。当 NTC 管 脚的电压达到 Vth ( high ) NTC 时图 5（4），输出电流缓慢地增大至最大值。 9. 极限值 表 4. 极限值 按照绝对最大额定值系统（IEC 60134）. 符号 参数 条件 最小值 最大值 单位 SR 电压变化率 管脚 DRAIN 上 -5 +5 V/ns fconv 变换频率 25 200 kHz Ptot Tamb Tj Tstg 总耗散功率 - <tbd> W 环境温度 -40 +125 °C 结点温度 -40 +150 °C 存储温度 -55 +150 °C 一般值 SO8 封装 电压 电源电压 连续的[3] −0.4 +15 V 管脚 DRAIN 的电压 600V 版 −0.4 +600 V 管脚 HV 的电压 电流受限 −0.4 +600 V 管脚 SENSE 的电压 电流受限 −0.4 +5.2 V 管脚 NTC 的电压 电流受限 −0.4 +5.2 V IDD 供电电流 管脚 Vcc[3]上 - 20 mA IDRIVER IDVDT 管脚 DRIVER 的电流 10% -0.4 1 A - 1.3 A -2.0 +2.0 KV -1.0 +1.0 KV -500 +500 V VCC VDRAIN VHV VSENSE VNTC 电流 管脚 DVDT 的电流 人体模型 (除了 DRAIN 和 HV 以外的所有管脚) 静电放电电压 VESD [1] 对于 DRAIN 和 HV 的人 体模型 带电装置 [2] [1] 人体模型：相当于通过一个 1.5kΩ 的串联电阻给一个 100pF 的电容放电。 [2] 带电装置模式： 相当于给芯片充电至 1kV， 随后通过一个 1 Ω 电阻给每个管脚放电至 0V。 [3] 内部的钳位电路设置供电电压和电流限制 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 10 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 10. 热特性 表 5. 热特性 符号 参数 条件 典型值 单位 <tbd> K/W <tbd> K/W 在大气中； SO8 封装,PCB： Rth ( j a ) 结点至周围环境的热阻 2cm×3cm,2 层， 每层 35μm 厚 的铜 在大气中； SO8 封装,PCB： Rth (i c ) 节点至外壳的热阻 2cm×3cm,2 层， 每层 35μm 厚 的铜 11. 特征值 表 6. 特征值 符号 最小 典型 值 值 参数 条件 Ileak ( DRAIN ) DRAIN 脚的漏电流 VDRAIN 600V - Ileak ( HV ) HV 脚的漏电流 VHV 600V - 最大值 单位 10 A - 30 A 高压 供电 VCC ( startup ) VCC ( stop ) 启动电压 11 12 13 V 截止电压 8 9 10 V VCC ( hys ) 滞环电压 2.0 - - V VCC ( rst ) 重置电压 4.5 5 5.5 V VCC ( swon) reg VCC ( swoff ) reg 调节器的开通电压 dV/dt 供电不足 8.75 9.25 9.75 V 调节器的关断电压 dV/dt 供电不足 9.5 10 10.5 V VCC ( reg ) hys VCC ( regswon stop ) 调节器供电电压滞 VCC ( startup ) 和 VCC ( stop ) 之间 VCC ( swoff ) reg VCC ( swoff ) reg 后 调节器开通和关断 的供电电压差 VCC ( swon) reg VCC ( stop ) 0.3 V 0.3 V 功耗 在启动期间或者处于保 Istb ( HV ) SSL4101T 初步数据表 HV 管脚的待机电流 护模式； VHV 100V 300 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 350 400 μA 恩智浦公司版权所有 11 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 表 6. 特征值（续） 符号 参数 条件 最小值 典型值 最大值 单位 ICC ( INT ) 内部供电电流 额定运行 - 1.3 - mA 1 1.3 1.6 mA 2 2.3 2.6 mA 480 500 520 mV 230 250 270 mV V / t 0.1V / s - 75 100 ns 过流保护 260 300 340- ns 短路保护 210 250 290 ns 30 50 1.4 1.5 1.6 V -30 -20 -10 V / s 200 550 1000 kHz 15 20 25 V - 100 - ns 12.5 15 16 s -0.3 -0.25 A 性能 待机： VHV 40V ； I sup( high) HV HV 管脚的高供电 电流 VCC VCC ( stop ) 调节器工作：VHV 40V ； 启动后 VCC VCC ( swon ) reg 电流和 SWP Vth(ocp ) SOURCE SOURCE 脚的过流 保护阈值电压 V / t 0.1V / s V / t 0.1V / s VNTC 0.325V td (ocp swoff ) tleb tleb Vth( swp ) SOURCE 从过流保护到关断 的延迟时间 前沿死区时间 前沿死区时间差 在过流保护和短路保护 前沿死区时间 tleb 之间 SOURCE 脚的短路 保护阈值电压 ns 波谷检测 (V / t )vrec 波谷检测电压随时 fring 振铃频率 Vvrec (min) 最小波谷检测电压 td (vrec swon) 间的变化率 差 在 DRAIN 管脚上 管脚 DRAIN 上的压降 波谷识别到开通的 延迟时间 低压检测 ton ( high ) 最大导通时间 DRIVER（管脚 DRIVER） Isource ( DRIVER ) SSL4101T 初步数据表 DRIVER 管脚上的 源电流 VDRIVER 2V 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 12 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 表 6. 特征值（续） 符号 I sin k ( DRIVER) Vo ( DRIVER )max Vo ( DRIVER )min t f ( DRIVER ) tr ( DRIVER ) 参数 DRIVER 管脚上的灌电 流 条件 最小值 典型值 最大值 单位 VDRIVER 2V 0.25 0.3 - A VDRIVER 10V 0.6 0.75 9 10.5 12 V - <tbd> <tbd> V - <tbd> - V/ns <tbd> - V/ns DRIVER 管脚的最大输 出电压 DRIVER 管脚的最小大 输出电压 DRIVER 管脚的下降时 间 DRIVER 管脚的下降时 间 Cdriver 1nF Cdriver 1nF A NTC 功能 Vth( high) NTC Vth(low) NTC Vact (tmr ) NTC Vdeact (tmr ) NTC NTC 脚的高电压阈值 0.47 0.5 0.53 V NTC 脚的低电压阈值 0.325 0.35 0.375 V 0.27 0.3 0.325 V 0.15 0.2 0.25 V NTC 脚的定时器激活电 压 NTC 脚的定时器关断电 压 tto( deact ) NTC NTC 脚的停用超时时间 32 44 56 s Ioffset ( NTC ) NTC 脚的补偿电流 - -47 - A t det( sc ) 短路检测时间 16 20 24 ms toff ( high ) 最大关断时间 30 36 42 μs 过热保护激活阈值温度 160 170 180 °C 过热保护释放阈值温度 90 100 110 °C OSP 过热保护 Tth ( act )otp Tth ( rel )otp SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 13 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 12. 应用信息 使用 SSL2109 的 LED 驱动器是工作在 BCM 模式的降压式变换器，见图 6。在启动阶段通过 HV 管 脚给芯片供电，正常工作时通过电容 C5 给芯片供电，电容 C3 用来缓冲芯片的供电电压。检测电 阻 R4 和 R5 将流过 MOSFET Q1 的电流转化成管脚 Source 上的电压。这些电阻的值决定了 MOSFET Q1 的原边最大峰值电流，同样的也决定了流过 LED 的电流。电阻 R6 减小 DRIVER 管脚的反向电 流。DRAIN 管脚和 Q1 的漏极相连用来进行波谷检测。 在图 6 所示的例子中，NTC 管脚用于温度保护。温度标准由热敏电阻 R3 设定，电容 C4 用来降低 NTC 管脚上的噪音。更多信息可以在 SSL2109 应用手册中找到。 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 14 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 13. 封装外形 图 7.封装外形 SOT96-1（SOT8） SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 15 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 14. 缩略词 表 7. 缩略词 首字母缩写 描述 BCM 临界导通模式 BOM 材料清单 LED 发光二极管 LEB 前沿消隐 MOSFET 金属氧化物半导体场效应晶体管 OCP 过流保护 OSP 输出短路保护 OTP 过热保护 PCB 印刷电路板 PWM 脉冲宽度调制 SWP 绕组短路保护 UVLO 欠电压闭锁 ZCS 零电流开关 15. 参考资料 [1] SSL2108x — 数据手册：LED 照明驱动器 [2] AN11041—应用手册：SSL 应用系列中的 SSL2108X 驱动器 [3] AN10876—应用手册：SSL 应用系列中的降压式变换器 [4] UM10512—用户手册：LED 照明绿色芯片控制器 [5] AN11136—应用手册：SSL 应用系列中的降压式变换器 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 16 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 16. 修订历史 表 8. 修订历史 文档编号 发布日期 数据手册状态 变更说明 取代 v.1 2011×××× 目标数据手册 - - SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 17 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 17. 法律信息 17.1 数据表状态 文档状况[1][2] 生产状况[3] 阐释 目标［简短］数据表 开发 本资料包含来自用于产品开发的目标技术规格的数据。 初步［简短］数据表 认证 本资料包含来自初步技术规格的数据。 产品［简短］数据表 生产 本资料包含产品技术规格。 [1] 在开始或结束设计之前，请查阅最近发布的资料。 [2] 术语„短的数据表‟在“定义”部分中解释。 [3] 本资料中描述的装置的产品状态自从本资料出版以来可能已经发生了变化，在多个装置的情况下可能会不同。最新的产品状 态信息可通过互联网获得，URL网址为：http://www.nxp.com。 17.2 定义 草案——资料只是草案版本。内容仍然在进行内部审核，还未得到正式批准；这可能导致变更或增加。恩智浦半导体公司 对于信息的准确性或完整性不给出任何陈述或担保，而且对于使用此信息的后果也不承担任何责任。 短的数据表——简短数据表是来自具有相同产品型号和标题的完整数据表的摘要。简短数据表只打算作为快速参考，不得 认为它含有详细的完整信息。对于详细的完整信息，参见相关完整数据表；请向当地恩智浦半导体公司销售处索取。一旦与简 短数据表发生了任何矛盾或冲突，以完整数据表为准。 产品说明——除非NXP半导体和客户另外在书面上达成协议，否则，双方都应承认产品数据手册上的信息和数据所定义的 产品说明。但是，在产品数据手册中， 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19 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 19. 表格 表 表 表 表 表 表 表 表 1. 2. 3. 4. 5. 6. 7. 8. SSL4101T 初步数据表 快速参考手册 . . . . . . . . . . . . . . . . . . . .2 订购信息 . . . . . . . . . . . . . . . . . . . . . . . .2 管脚描述 . . . . . . . . . . . . . . . . . . . . . . . .4 极限值. . . . . . . . . . . . . . . . . . . . . . . . . . . .10 热特性. . . . . . . . . . . . . . . . . . . . . . . . . . . .11 特征值 . . . . . . . . . . . . . . . . . . . . . . . . . .11 缩略词. . . . . . . . . . . . . . . . . . . . . . . . . . . .16 修订历史. . . . . . . . . . . . . . . . . . . . . . . . . .17 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 20 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 20. 插图 图 1. 图 2. 图 3. 图 4. 图 5. 图 6. 图 7. SSL2109 方框图. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 管脚配置. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . … . . . . 3 SSL2109 的基本应用电路图. . . . . . . . . . . . . . . . . . . . . . 4 Buck 波形和波谷检测. . . . . . . . . . . . . . . . . . . . . . . . . . . .6 NTC 控制曲线 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 SSL2109 典型应用电路. . . . . . . . . . . . . . . . . . . .. . . . . . .14 SOT96-1（SOT8）的封装外形. . . . . . . . . . . . . . . . . . . .15 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 21 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 21. 目录 1. 概述 .................................................................................. Error! Bookmark not defined. 2 特征和优点 ......................................................................................................................... 1 3 应用 ..................................................................................................................................... 2 4 快速参考数据 ..................................................................................................................... 2 5. 订购信息 ......................................................................................................................... 2 6. 模块框图 ......................................................................................................................... 3 7. 管脚信息 ......................................................................................................................... 3 7.1 管脚 .................................................................................................................. 3 7.2 管脚描述 .......................................................................................................... 4 8. 功能描述 ......................................................................................................................... 4 8.1 简介 .................................................................................................................. 4 8.2 变换器运行 ...................................................................................................... 4 8.3 变换频率 .......................................................................................................... 5 8.4 Driver 管脚 ....................................................................................................... 5 8.5 波谷检测 .......................................................................................................... 5 8.6 保护功能 .......................................................................................................... 6 8.7 VCC 供电 ........................................................................................................... 8 8.8 DVDT 供电 ........................................................................................................ 8 8.9 VCC 调节器 ......................................................................................................... 9 8.10 NTC 功能和 PWM 调光 .................................................................................... 9 8.10.1 软启动功能 ............................................................................................... 10 9. 极限值 ........................................................................................................................... 10 10. 热特性 ........................................................................................................................... 11 11. 特性 ............................................................................................................................... 11 12. 应用信息 ....................................................................................................................... 12 13. 封装外形 ....................................................................................................................... 15 14. 缩略词 ........................................................................................................................... 16 15. 参考资料 ....................................................................................................................... 16 16. 修订历史 ....................................................................................................................... 17 17. 法律信息 ....................................................................................................................... 18 17.1 数据表状态 ....................................................................................................... 18 17.2 定义 .................................................................................................................. 18 17.3 声明 ................................................................................................................... 18 17.4 商标 ................................................................................................................... 19 18. 联系信息 ....................................................................................................................... 19 19. 表格 ............................................................................................................................... 20 20. 插图 ............................................................................................................................... 21 21. 目录 ............................................................................................................................... 22 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 22 SSL2109 NXP 半导体 用于 LED 照明的绿色芯片驱动器 此文档仅供参考。任何内容变更以官方英文数据手册为准。 与本资料及其所描述产品相关的重要注意事项已经包括在“法律信息”部分。 © NXP B.V. 2011。版权所有。 有关详细信息，请访问： http://www.nxp.com 销售办事处的地址，请发电子邮件至: [email protected] 发布日期： 2012 年 1 月 10 日 文档标识符： SSL2109 SSL4101T 初步数据表 法律免责声明适用于所有信息 版本 .1---- 2012 年 1 月 10 日 恩智浦公司版权所有 23 SSL2109 series Compact non-dimmable LED controller IC Rev. 4 — 26 October 2012 Product data sheet 1. General description The SSL2109 series is a range of high-voltage Integrated Circuits (IC) for driving LED lamps in general lighting applications. The main benefits of this IC include: • • • • • • • Small Printed-Circuit Board (PCB) footprint and compact solution High efficiency (up to 95 %) for non-dimmable high power factor solutions High power factor >0.9 (application dependent) Ease of integration and many protection features Low electronic Bill Of Material (BOM) Highly flexible IC for use in buck, buck/boost and flyback modes Single inductor used for non-isolated configurations because of internal demagnetization detection and dV/dt supply The IC is supplementary to the SSL21081/SSL21083 series but without an internal switch. The IC range has been designed to start up directly from the HV supply by an internal high-voltage current source. Thereafter, the dV/dt supply is used with capacitive coupling from the drain, or any other auxiliary supply. This functionality provides full flexibility in the application design. An internal clamp limits the supply voltage. The IC provides accurate output current control to within 5 % LED current accuracy. The IC can be operated using Pulse-Width Modulation (PWM) current regulation and has many protection features including easy LED temperature feedback. 2. Features and benefits LED controller IC for driving strings of LEDs or high-voltage LED modules from a rectified mains supply Part of a high-efficiency switch mode flyback or buck product family. Controller-only which can drive an external MOSFET Controller that has power-efficient boundary conduction mode of operation with: No reverse recovery losses in freewheel diode Zero Current Switching (ZCS) for switch turn-on Zero voltage or valley switching for switch turn-off Minimal required inductance value and size SL2109AT: suitable for high power factor (>0.9) applications Applicable in buck, buck/boost and flyback topologies SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC Direct PWM current regulation possible Fast transient response through cycle-by-cycle current control: Negligible AC mains ripple in LED current and minimal total capacitance in low ripple configurations No over or undershoots in the LED current Simple high input power factor solution (>0.9) Internal Protection features: UnderVoltage LockOut (UVLO) Leading-Edge Blanking (LEB) OverCurrent Protection (OCP) Short-Winding Protection (SWP); SSL2109T only Internal OverTemperature Protection (OTP) Brownout protection Output Short Protection (OSP) Low component count (see Figure 4) LED driver solution: No dim switch and high-side driver required for PWM current regulation Easy external temperature protection with a single NTC Option for soft-start function Compatible with wall switches with built-in indication light during standby IC lifetime easily matches or surpasses LED lamp lifetime 3. Applications The SSL2109 is intended for compact LED lamps with accurate fixed current output for single mains input voltages. Mains input voltages include 100 V, 120 V and 230 V (AC). The output signal can be modulated using a PWM signal. The power range is determined by external components. 4. Quick reference data Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit VCC supply voltage operating range 8 - 14 V ICC(INT) internal supply current normal operation - 1.3 - mA VHV voltage on pin HV - - 600 V VDRAIN voltage on pin DRAIN −0.4 - 600 V fconv conversion frequency - 100 - kHz 9 10.5 12 V Vo(DRIVER)max maximum output voltage on pin DRIVER SSL2109_SER Product data sheet VCC > VCC(startup) All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 2 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 5. Ordering information Table 2. Ordering information Type number SSL2109AT Package Name Description Version SO8 plastic small package outline body; 8 leads; body width 3.9 mm SOT96-1 SSL2109T 6. Block diagram HV VCC 1 2 JFET dV/dT SUPPLY 6 VALLEY DETECTION 8 DVDT SUPPLY: INTERNAL REGULATOR AND BANDGAP DRAIN LOGIC TOFFMAX NTC 3 NTC FUNCTION THERMAL SHUTDOWN TONMAX LOGIC CONTROL AND PROTECTION 5 DRIVER BLANK POR 4 SOURCE OCP GND 7 0.5 V < > 0.25 V aaa-003466 Fig 1. SSL2109_SER Product data sheet SSL2109AT block diagram All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 3 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC HV VCC 1 2 JFET dV/dT SUPPLY 6 VALLEY DETECTION 8 DVDT SUPPLY: INTERNAL REGULATOR AND BANDGAP DRAIN LOGIC TOFFMAX NTC 3 NTC FUNCTION THERMAL SHUTDOWN TONMAX LOGIC CONTROL AND PROTECTION 5 DRIVER BLANK POR 4 SOURCE 1.5 V SWP GND 7 OCP 0.5 V < > 0.25 V aaa-001925 Fig 2. SSL2109_SER Product data sheet SSL2109T block diagram All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 4 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 7. Pinning information 7.1 Pinning HV 1 VCC 2 8 DRAIN 7 GND IC NTC 3 6 DVDT SOURCE 4 5 DRIVER aaa-001742 Fig 3. SSL2109 pin configuration 7.2 Pin description Table 3. SSL2109_SER Product data sheet Pin description Symbol Pin Description HV 1 high-voltage supply pin VCC 2 supply voltage NTC 3 temperature protection input SOURCE 4 low-side external switch DRIVER 5 driver output DVDT 6 AC supply pin GND 7 ground DRAIN 8 high-side external switch All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 5 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 8. Functional description 8.1 Introduction The SSL2109 is a range of products for small form factor retrofit SSL lamps and separate LED drivers. 8.2 Converter operation The converter in the SSL2129 is a Boundary Conduction Mode (BCM), peak current controlled system. See Figure 4 for the basic application diagram. See Figure 5 for the waveforms. This converter type operates at the boundary between continuous and discontinuous mode. Energy is stored in inductor L each period that the switch is on. The inductor current IL is zero when the MOSFET is switched on. The amplitude of the current build-up in L is proportional to the voltage drop over the inductor and the time that the MOSFET switch is on. When the MOSFET is switched off, the energy in the inductor is released towards the output. The current then falls at a rate proportional to the value of VOUT. The LED current ILED depends on the peak current through the inductor (SSL2109 controlled) and on the HV bus voltage while it is optimized for a high power factor. A new cycle is started once the inductor current IL is zero. This quasi-resonant operation results in higher efficiency. Rinrush Vsec LEDs HV VCC NTC GND 6 1 8 2 IC 3 5 7 4 DVDT DRAIN DRIVER SOURCE NTC Rsense aaa-001743 Fig 4. SSL2109AT basic low ripple buck application diagram 8.3 Driver pin The SSL2109 is equipped with an internal driver that can control an external switch. The voltage on the driver output pin is increased towards Vo(DRIVER)max to open the switch during the first cycle (t0 to t1). The voltage on the driver output pin is pulled down towards a low level from the start of the secondary stroke until the next cycle starts (t0 to t00). During transition from low to high and back, there is a controlled switching slope steepness. This controlled condition limits the high frequency radiation from the circuit to the surrounding area. At the lowest VCC voltage (VCC(stop)), the voltage of the driver is VO(DRIVER)min. SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 6 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 8.4 Valley detection A new cycle is started when the primary switch is switched on (see Figure 5). In the following sections, “on” represents the conductive state and off the non-conductive state. Following time t1, when the peak current is detected on the SOURCE pin, the switch is turned off and the secondary stroke starts at t2. When the secondary stroke is completed with the coil current at t3 equaling zero, the drain voltage starts to oscillate at approximately VIN − VOUT level. The peak to peak amplitude equals 2 × VOUT. A special feature, called valley detection is an integrated part of the SSL2109 circuitry. Dedicated built-in circuitry connected to the DRAIN pin, senses when the voltage on the drain of the switch has reached its lowest value. The next cycle is then started at t00 and as a result the capacitive switching losses are reduced. A valley is detected and accepted if both the frequency of the oscillations and the voltage swing are within the range specified (fring and ∆Vvrec(min)) for detection. ∆Vvrec(min) is the voltage differential between the HV (pin) in and the DRAIN pin. If a valid valley is not detected, the secondary stroke is continued until the maximum off-time (toff(high)) is reached, then the next cycle is started. A series resistance can be included at the drain sensing pin for flyback mode to remove the high-frequency ringing caused by the transformer leakage inductance. VGATE VOUT VDRAIN VIN valley 0 demagnetization magnetization IL 0 2 1 t0 t1 3 t2 4 t3 t00 T aaa-001744 Fig 5. SSL2109_SER Product data sheet Buck waveforms and valley detection All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 7 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 8.5 Protective features The IC has the following protections: • • • • • • • • UnderVoltage LockOut (UVLO) Leading-Edge Blanking (LEB) OverCurrent Protection (OCP) Internal OverTemperature Protection (OTP) Brownout protection Short-Winding Protection (SWP) SSL2109T only Output Short Protection (OSP) LED overtemperature control and protection The SWP and the OSP are latched protections. These protections cause the IC to halt until a reset (a result of power cycling) is executed. When VCC drops lower than VCC(rst), the IC resets the latch protection mode. The internal OTP and LED over temperature protections are safe-restart protections. When VCC drops lower than VCC(rst), the IC resets the latch protection mode. If VCC drops below VCC(stop), the IC halts. Switching starts only when no fault condition exists. 8.5.1 UnderVoltage LockOut (UVLO) When the voltage on the VCC pin drops lower than VCC(stop), the IC stops switching. An attempt is then made to restart by supplying VCC from the HV pin voltage. 8.5.2 Leading-Edge Blanking (LEB) To prevent false detection of the short-winding or overcurrent, a blanking time following switch-on is implemented. When the MOSFET switch turns on there can be a short current spike due to capacitive discharge of voltage over the drain and source. During the LEB time (tleb), the spike is disregarded. 8.5.3 OverCurrent Protection (OCP) The SSL2109 contains a highly accurate peak current detector. It triggers when the voltage at the SOURCE pin reaches the peak-level Vth(ocp)SOURCE. The current through the switch is sensed using a resistor connected to the SOURCE pin. The sense circuit is activated following LEB time tleb. As the LED current is half the peak current (by design), it automatically provides protection for maximum LED current during operation. There is a propagation delay between overcurrent detection and the actual closure of the switch td(ocp-swoff). Due to the delay, the actual peak current is slightly higher than the OCP level set using the resistor in series to the SOURCE pin. 8.5.4 OverTemperature Protection (OTP) When the internal OTP function is triggered at a certain IC temperature (Tth(act)otp), the converter stops operating. The OTP safe-restart protection and the IC restarts again with switching resuming when the IC temperature drops lower than Tth(rel)otp. SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 8 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 8.5.5 Brownout protection Brownout protection is designed to limit the lamp power when the input voltage drops close to the output voltage level. Since the input power has to remain constant, the input current would otherwise increase to a level that is too large for the input circuitry. For the SSL2109, there is a maximum limit on the on-time of switch ton(high). The rate of current rise in the coil during the on-phase is proportional to the difference between input voltage and output voltage. Therefore, the peak current cannot be reached before ton(high) and as a result the average output current to the LEDs is reduced. 8.5.6 Short-Winding Protection (SWP); SSL2109T only SWP activates if there is a steep rising current through the MOSFET. The voltage across the external resistor connected to the SOURCE pin increases. This current can occur when there is a short from the freewheel diode. Additionally, it occurs due to a small/shorted inductor between the input voltage and the DRAIN pin. If the voltage on the SOURCE pin is greater than 1.5 V, latched protection is triggered following LEB time tleb. In addition, if VCC drops lower than VCC(rst) the IC resets the latched protection mode. 8.5.7 Output Short-circuit Protection (OSP) During the second stroke (switch-off time), if a valley is not detected within the off-time limit (toff(high)), then typically the output voltage is less than the minimum limit allowed in the application. This condition can occur either during starting up or due to a short-circuit. A timer tdet(sc) is started when toff(high) is detected. Timer tdet(sc) is stopped when a valid valley detection occurs in one of the subsequent cycles. The timer can also be stopped if the maximum limit on the on-time of the switch (ton(high)) is reached, which is usually the case at start-up (brownout protection). If no valley is detected and (ton(high)) is not reached before tdet(sc), then it is concluded that a real short-circuit exists. The IC enters latched protection. If VCC drops lower than VCC(rst), the IC resets the latched protection mode (see Figure 6). During PWM dimming, the OSP timer is paused during the off cycle. toff(high) ton(high) S Q R TIMER tdet(sc) S Q OSP R ≥1 VALLEY DETECTION VCC(rst) aaa-005703 Fig 6. OPS logic diagram 8.6 VCC supply The SSL2109 can be supplied using three methods: • Under normal operation, the voltage swing on the DVDT pin is rectified within the IC providing current towards the VCC pin • At start-up, there is an internal current source connected to the HV pin. The current source provides internal power until either the dV/dt supply or an external current on the VCC pin provides the supply SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 9 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC • An external voltage source can be connected to the VCC pin The IC starts up when the voltage at the VCC pin is higher than VCC(startup). The IC locks out (stops switching) when the voltage at the VCC pin is lower than VCC(stop). The hysteresis between the start and stop levels allows the IC to be supplied by a buffer capacitor until the dV/dt supply is settled. The SSL2109 has an internal VCC clamp, which is an internal active Zener (or shunt regulator). This internal active Zener limits the voltage on the supply VCC pin to the maximum value of VCC. An external Zener diode is not needed in the supply circuit, if the maximum current of the dV/dt supply minus the current consumption of the IC (determined by the load on the gate drivers) is lower than the IDD maximum value. 8.7 DVDT pin supply The DVDT pin is connected to an internal single-sided rectification stage. When an alternating voltage with sufficient amplitude is supplied to the pin, the IC can be powered without any other external power connection. This solution provides an effective method to prevent the additional high-power losses, which would result if a regulator were used for continuously powering the IC. Unlike an auxiliary supply, additional inductor windings are not needed. 8.8 VCC regulator During supply dips, the input voltage can drop too low to supply the required IC current through the DVDT pin. Under these conditions, if the VCC voltage drops lower than VCC(swon)reg level, another regulator with a current capability of up to IHVhigh(oper) is started. The job of the regulator is to fill in the required supply current, which the DVDT supply does not deliver preventing the IC going into UVLO. When the VCC voltage is higher than VCC(swon)reg level, the regulator is turned off. 8.9 NTC functionality and PWM dimming The NTC pin can be used as a control method for LED thermal protection. Alternatively, the pin can be used as an input to disable/enable light output using a digital signal (PWM dimming). The pin has an internal current source that generates the current of Ioffset(NTC). An NTC resistor to monitor the LED temperature can be directly connected to the NTC pin. Depending on the resistance value and the corresponding voltage on the NTC pin, the converter reacts as shown in Figure 7. SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 10 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC Peak current Fig 7. 1 2 3 4 Vth(high)NTC Vth(ocp)SOURCE = 250 mV Vth(low)NTC Ipk / 2 Vact(tmr)NTC Vth(ocp)SOURCE = 500 mV Vdeact(tmr)NTC Ipk 5 VNTC 001aan700 NTC control curve When the voltage on the NTC pin is higher than Vth(high)NTC see Figure 7 (4), the converter delivers nominal output current. When the voltage is lower than this level, the peak current is gradually reduced until Vth(low)NTC is reached, see Figure 7 (3). The peak current is now half the peak current of nominal operation. When Vact(tmr)NTC is passed, see Figure 7 (2) a timer starts to run to distinguish between the following situations: • If the low-level Vdeact(tmr)NTC is not reached within time tto(deact)NTC, Figure 7 (1) LED overtemperature is detected. The IC stops switching and attempts to restart from the HV pin voltage. Restart takes place when the voltage on NTC pin is higher than Vth(high)NTC, see Figure 7 (4). It is assumed that the reduction in peak current did not result in a lower NTC temperature and LED OTP is activated. • If the low-level Vdeact(tmr)NTC is reached within the time tto(deact)NTC, Figure 7 (1) it is assumed that the pin is pulled down externally. The restart function is not triggered. Instead, the output current is reduced to zero. PWM dimming can be implemented this way. The output current rises again when the voltage is higher than Vdeact(tmr)NTC. 8.9.1 Soft-start function The NTC pin can be used to make a soft start function. During switch-on, the level on the NTC pin is low. By connecting a capacitor (in parallel with the NTC resistor), a time constant can be defined. The time constant causes the level on the NTC pin to increase slowly. When passing level Vth(low)NTC Figure 7 (3), the convertor starts with half of the maximum current. The output current slowly increases to maximum when Vth(high)NTC Figure 7 (4) is reached. SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 11 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 9. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter Conditions Min Max Unit SR slew rate on pin DRAIN −5 +5 V/ns Ptot total power dissipation SO8 package - 0.6 W Tamb ambient temperature −40 +125 °C Tj junction temperature −40 +150 °C Tstg storage temperature −55 +150 °C continuous [1] −0.4 +14 V General Voltages VCC supply voltage VDRAIN voltage on pin DRAIN 600 V version −0.4 +600 V VHV voltage on pin HV current limited −0.4 +600 V VSOURCE voltage on pin SOURCE current limited −0.4 +5.2 V VNTC voltage on pin NTC current limited −0.4 +5.2 V IDD supply current at pin VCC - 20 mA IDVDT current on pin DVDT duration 20 µs maximum - 1.3 A VESD electrostatic discharge voltage human body model; (for all pins except DRAIN and HV) −2 +2 kV −1 +1 kV −500 +500 V Currents [2] human body model for DRAIN and HV charged device [3] [1] An internal clamp sets the supply voltage and current limits. [2] Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor. [3] Charged device model: equivalent to charging the IC up to 1 kV and the subsequent discharging of each pin down to 0 V over a 1 Ω resistor. 10. Thermal characteristics Table 5. Symbol Parameter Conditions Typ Unit Rth(j-a) thermal resistance from junction to ambient in free air; PCB: 2 cm × 3 cm; 2-layer; 35 µm Cu per layer 159 K/W in free air; PCB: JEDEC 2s2p 89 K/W top package temperature measured at the warmest point on top of the case 0.49 K/W Ψj-top SSL2109_SER Product data sheet Thermal characteristics thermal resistance from junction to top All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 12 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 11. Characteristics Table 6. Characteristics Symbol Parameter fconv conversion frequency Conditions Min Typ Max Unit - 100 - kHz High-voltage Ileak(DRAIN) leakage current on pin DRAIN VDRAIN = 600 V - - 10 µA Ileak(HV) leakage current on pin HV VHV = 600 V - - 30 µA VCC supply voltage operating range 8 - 14 V VCC(startup) start-up supply voltage 11 12 13 V VCC(stop) stop supply voltage 8 9 10 V VCC(hys) hysteresis of supply voltage 2 - 4.5 V VCC(rst) reset supply voltage 4.5 5 5.5 V VCC(swon)reg regulator switch-on supply voltage insufficient dV/dt supply 8.75 9.25 9.75 V VCC(swoff)reg regulator switch-off supply voltage insufficient dV/dt supply 9.5 10 10.5 V VCC(reg)hys regulator supply voltage hysteresis VCC(swoff)reg − VCC(swon)reg 0.3 - - V VCC(swon)reg − VCC(stop) 0.3 - - V Supply between VCC(startup) and VCC(stop) VCC(regswon-stop) supply voltage difference between regulator switch-on and stop [1] Consumption Istb(HV) standby current on pin HV during start-up or in protection; VHV = 100 V 300 350 400 µA ICC(INT) internal supply current normal operation - 1.3 - mA high supply current on pin HV Standby: VHV = 40 V; VCC < VCC(stop) 1 1.3 1.6 mA Regulator On: VHV = 40 V; VCC < VCC(swon)reg after start-up 2 2.3 2.6 mA overcurrent protection threshold voltage on pin SOURCE ∆V/∆t = 0.1 V/µs 480 500 520 mV ∆V/∆t = 0.1 V/µs; VNTC = 0.325 V 230 250 270 mV td(ocp-swoff) delay time from overcurrent protection to switch-off ∆V/∆t = 0.1 V/µs - 75 100 ns tleb leading edge blanking time Capability Isup(high)HV Current and SWP Vth(ocp)SOURCE overcurrent protection 260 300 340 ns short-winding protection 210 250 290 ns ∆tleb leading edge blanking time difference between tleb for overcurrent protection and short-winding protection 30 50 - ns Vth(swp)SOURCE short-winding protection threshold voltage on pin SOURCE SSL2109T only 1.4 1.5 1.6 V SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 13 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC Table 6. Characteristics …continued Symbol Parameter Conditions Min Typ Max Unit (∆V/∆t)vrec valley recognition voltage change with time on pin DRAIN −30 −20 −10 V/µs fring ringing frequency 200 550 1000 kHz ∆Vvrec(min) minimum valley recognition voltage difference 15 20 25 V td(vrec-swon) valley recognition to switch-on delay time - 100 - ns 12.5 15 17.5 µs Valley detection [2] voltage drop on pin DRAIN Brownout detection ton(high) high on-time Driver (pin DRIVER) Isource(DRIVER) source current on pin DRIVER 1.5 ms maximum; VDRIVER = 2 V - −0.195 - A Isink(DRIVER) sink current on pin DRIVER 20 µs maximum; VDRIVER = 2 V - 0.28 - A 20 µs maximum; VDRIVER = 10 V - 0.46 - A Vo(DRIVER)max maximum output voltage on pin DRIVER VCC > VCC(startup) 9 10.5 12 V Vo(DRIVER)min minimum output voltage on pin DRIVER VCC = VCC(stop) 6.5 7.5 8.5 V V NTC functionality Vth(high)NTC high threshold voltage on pin NTC 0.47 0.5 0.53 Vth(low)NTC low threshold voltage on pin NTC 0.325 0.35 0.375 V Vact(tmr)NTC timer activation voltage on pin NTC 0.26 0.3 0.325 V Vdeact(tmr)NTC timer deactivation voltage on pin NTC 0.17 0.2 0.23 V tto(deact)NTC deactivation time-out time on pin NTC 33 46 59 µs Ioffset(NTC) offset current on pin NTC - −47 - µA tdet(sc) short-circuit detection time 16 20 24 ms toff(high) high off-time 30 36 42 µs OSP Temperature protection Tth(act)otp overtemperature protection activation threshold temperature 160 170 180 °C Tth(rel)otp overtemperature protection release threshold temperature 90 100 110 °C [1] The maximum operating voltage at VCC can exceed 14 V when determined by the IC using the dV/dt supply. [2] This parameter is not tested during production, by design it is guaranteed SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 14 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 12. Application information A LED driver with the SSL2109 can be a buck, tapped buck or flyback converter operating in BCM. Figure 8 shows a buck solution in a low ripple configuration using a minimum of components. Capacitor C3 buffers the IC supply voltage, which is powered via the HV pin at start-up and via C5 during normal operation. Sense resistors R4 and R5 converts the current through MOSFET Q1 into a voltage on pin Source. The value of these resistors defines the maximum primary peak current on MOSFET Q1, and thus the LED current. Resistor R6 reduces the reverse current into the DRIVER pin. The DRAIN pin is connected with the drain of Q1 for valley detection. In the example shown in Figure 8, the NTC pin is used for temperature protection. The temperature level is set by Negative Temperature Coefficient (NTC) resistor R3 and capacitor C4 reduces noise on the NTC pin. Further information can be found in the SSL2109 application note. LED+ L1 1 mH R1 fuse L L 1 J6-1 2 D1 1 DBLS105G 3 500 mA SL 4 1 LED+ J5-1 C1 2.2 µF 385 V U1 RV1 varistor 275 V N U N1 HV VCC R2 NTC J6-2 C6 10 µF 160 V D2 BYV25G-600 C2 3.3 µF 400 V 10 Ω SOURCE LED8 1 2 SSL2109 7 3 6 4 5 L2 DRAIN GND DVDT LEDJ5-2 C5 DRIVER 120 pF 1 kV Q1 MOSFET N R6 100 Ω,1206 C4 1 nF C3 1 µF 16 V 1 2.1 mH 1000 mA R3 NTC 100 kΩ R4 2.2, 1 % R5 1.5, 1 % aaa-001746 Fig 8. A typical SSL2109 buck low ripple application SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 15 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 13. Package outline SO8: plastic small outline package; 8 leads; body width 3.9 mm SOT96-1 D E A X c y HE v M A Z 5 8 Q A2 A (A 3) A1 pin 1 index θ Lp L 4 1 e detail X w M bp 0 2.5 5 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (2) e HE L Lp Q v w y Z (1) mm 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 5.0 4.8 4.0 3.8 1.27 6.2 5.8 1.05 1.0 0.4 0.7 0.6 0.25 0.25 0.1 0.7 0.3 0.01 0.019 0.0100 0.014 0.0075 0.20 0.19 0.16 0.15 inches 0.010 0.057 0.069 0.004 0.049 0.05 0.039 0.028 0.244 0.041 0.016 0.024 0.228 0.01 0.01 0.028 0.004 0.012 θ 8o o 0 Notes 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. Fig 9. REFERENCES OUTLINE VERSION IEC JEDEC SOT96-1 076E03 MS-012 JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-18 Package outline SOT96-1 (SOT8) SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 16 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 14. Abbreviations Table 7. SSL2109_SER Product data sheet Abbreviations Acronym Description BCM Boundary Conduction Mode BOM Bill Of Materials LEB Leading-Edge Blanking LED Light Emitting Diode MOSFET Metal-Oxide Semiconductor Field-Effect Transistor OCP OverCurrent Protection OSP Output Short Protection OTP OverTemperature Protection PCB Printed-Circuit Board PWM Pulse-Width Modulation SWP Short-Winding Protection UVLO UnderVoltage LockOut ZCS Zero-Current Switching All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 17 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 15. Revision history Table 8. Revision history Document ID Release date Data sheet status Change notice Supersedes SSL2109_SER v.4 20121026 Product data sheet - SSL2109T v.3 SSL2109_SER v.3 20120604 Product data sheet - SSL2109T v.2 SSL2109T v.2 20120426 Product data sheet - SSL2109 v.1.1 SSL2109 v.1.1 20120410 Preliminary data sheet - SSL2109 v.1 SSL2109 v.1 20120330 Preliminary data sheet - - SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 18 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 16. Legal information 16.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term ‘short data sheet’ is explained in section “Definitions”. [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 16.2 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet. 16.3 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. SSL2109_SER Product data sheet Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale — NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 19 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Quick reference data — The Quick reference data is an extract of the product data given in the Limiting values and Characteristics sections of this document, and as such is not complete, exhaustive or legally binding. Non-automotive qualified products — Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NXP Semiconductors accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NXP Semiconductors’ warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NXP Semiconductors’ specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies NXP Semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NXP Semiconductors’ standard warranty and NXP Semiconductors’ product specifications. Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. 16.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. GreenChip — is a trademark of NXP B.V. 17. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] SSL2109_SER Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 4 — 26 October 2012 © NXP B.V. 2012. All rights reserved. 20 of 21 SSL2109 series NXP Semiconductors Compact non-dimmable LED controller IC 18. Contents 1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.5.1 8.5.2 8.5.3 8.5.4 8.5.5 8.5.6 8.5.7 8.6 8.7 8.8 8.9 8.9.1 9 10 11 12 13 14 15 16 16.1 16.2 16.3 16.4 17 18 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Quick reference data . . . . . . . . . . . . . . . . . . . . . 2 Ordering information . . . . . . . . . . . . . . . . . . . . . 3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pinning information . . . . . . . . . . . . . . . . . . . . . . 5 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 Functional description . . . . . . . . . . . . . . . . . . . 6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Converter operation . . . . . . . . . . . . . . . . . . . . . 6 Driver pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Valley detection. . . . . . . . . . . . . . . . . . . . . . . . . 7 Protective features . . . . . . . . . . . . . . . . . . . . . . 8 UnderVoltage LockOut (UVLO) . . . . . . . . . . . . 8 Leading-Edge Blanking (LEB) . . . . . . . . . . . . . 8 OverCurrent Protection (OCP) . . . . . . . . . . . . . 8 OverTemperature Protection (OTP) . . . . . . . . . 8 Brownout protection . . . . . . . . . . . . . . . . . . . . . 9 Short-Winding Protection (SWP); SSL2109T only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Output Short-circuit Protection (OSP). . . . . . . . 9 VCC supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 DVDT pin supply. . . . . . . . . . . . . . . . . . . . . . . 10 VCC regulator . . . . . . . . . . . . . . . . . . . . . . . . . 10 NTC functionality and PWM dimming . . . . . . . 10 Soft-start function . . . . . . . . . . . . . . . . . . . . . . 11 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12 Thermal characteristics . . . . . . . . . . . . . . . . . 12 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13 Application information. . . . . . . . . . . . . . . . . . 15 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 16 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 18 Legal information. . . . . . . . . . . . . . . . . . . . . . . 19 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 19 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Contact information. . . . . . . . . . . . . . . . . . . . . 20 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2012. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 26 October 2012 Document identifier: SSL2109_SER