Confidential Datasheet Version 1.1 Single Channel LED Driver with Internal Dimming MOSFET General Description Features MAP3301C is a single channel boost type PWM driver with high efficiency. It is designed for high brightness LED driver optimized of backlighting system for LCD module. MAP3301C provides small solution size with internal high voltage & current dimming MOSFET and internal references. MAP3301C offers the function of accurate and fast LED dimming control using PWM interface. MAP3301C has the input line under voltage protection, LED Open/Short protection and Power Good indication. MAP3301C is available in SOIC-15 Pin package with Halogen-free (fully RoHS compliant). Wide input voltage : 8.5V ~ 33V Internal Dimming MOSFET PWM & Analog Dimming Current Mode Control Type Fixed Switching frequency : 100KHz Auto Restart Mode Protection Programmable Output Over Voltage Protection Programmable Input Line Voltage Protection LED Short Current Protection Power Good Indication (Open Drain) Small package : SOIC-15 Pin Applications High Brightness white LED backlighting for LCD TVs and monitors General LED lighting applications Ordering Information Part Number Top Marking Ambient Temperature Range Package RoHS Status MAP3301CSIRH MAP3301C -40℃ to +85℃ SOIC-15 Pin Halogen Free Typical Application December 2012 Page 1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Datasheet - MAP3301C Confidential Datasheet Version 1.1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Pin Configuration Pin Description PIN NO December 2012 Description 1 VDD Output for Gate drive voltage 2 GATE Gate drive Output for Boost Convert 3 CS 4 GND Current sense of the Boost Convert Ground 5 ADIM Analog Dimming using DC voltage level 6 VLDO Reference voltage 7 PGOOD 8 SOU Internal Dim MOSFET Source 9 DRN Internal Dim MOSFET Drain 11 COMP 12 OVP Over Voltage Protection 13 LUVP Input Line Under Voltage Protection 14 PWMI PWM Dimming Input 15 EN 16 VCC Output power good indication (Open-Drain status output, Normal : Open, Protection : Internal GND) Error Amp. Compensation Enable Input Power Supply Page 2 Confidential Datasheet Version 1.1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Functional Block Diagram December 2012 Page 3 Confidential Datasheet Version 1.1 PARAMETER VCC GATE, PWMI, LUVP, VDD VLDO, CS, COMP, ADIM, PGOOD, SOU, OVP, EN DRN Voltage DRN Current Operating Junction Temperature Range Absolute Temperature Range(1) Storage Temperature Range Lead temperature(soldering, 10sec ) Thermal Resistance (θJA) VALUE UNIT -0.3 ~ 36 -0.3 ~ 20 -0.3 ~ 5 250 6.2 -40 ~ 125 -40 ~ 150 -65 ~ 150 260 70 V V V V A ℃ ℃ ℃ ℃ ℃/W Note 1 : Normal electrical operating is not guaranteed out of the operating junction temperature range. December 2012 Page 4 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Absolute Maximum Ratings Confidential Datasheet Version 1.1 VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT SUPPLY VCC,OP Input voltage range Ta = - 40℃ ~ 85℃ 8.5 - 33 V ISD Shut down current EN = 0V 40 80 160 uA IQ Operation quiescent current PWMI = 0V, EN = 5V - 2.5 5.0 mA IOP Operation Current PWMI = 5V, EN = 5V - 10 - mA VEN_L : Logic Low - - - 0.8 V VEN_H : Logic High - 2.0 - - V 60 120 240 ㏀ VEN REN Enable pull down resistor EN = 5V Under-voltage release threshold - 7.5 8 8.5 V Under-voltage lockout hysteresis - - 1 - V Ta = - 40℃ ~ 85℃ 4.90 5.00 5.10 V Ta = 25℃ 4.95 5.00 5.05 V - - 0.02 %/V - - 1 %/mA - 10 - V VUVLO VLDO & VDD VLDO Reference pin voltage VLDOLI Line regulation VLDOLO Load regulation VDD Gate Drive voltage Iref = 0uA, PWMI = 0V, Cref = 0.1uF Iref = 0~500uA, PWMI = 0V, Cref = 0.1uF Ta = 25℃, Vcc > 12V, No load Oscillator FOSC Oscillator frequency - 95 100 105 kHz DMAX Maximum duty cycle - - 90 - % GATE ISOURCE Gate short circuit current VGATE = 0, VCC = 12V 0.05 0.18 - A ISINK Gate sink current VGATE = 10V, VCC = 12V 0.15 0.28 - A TRISE GATE output rise time CGATE = 1nF, VCC = 12V - 50 - nS TFALL GATE output fall time CGATE = 1nF, VCC = 12V - 25 - nS VGATE Gate Output Voltage - 10 - V December 2012 - Page 5 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Electrical Characteristics Confidential Datasheet Version 1.1 VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT - 100 - 375 nS Current Sense TBLANK Leading Edge Blanking TDELAY Delay to output of CS comparator(3) VCOMP = 5V VCS = 0V to 600mV step pulse - - 180 nS VCS,MAX Maximum CS Voltage VCC = 12V, VADIM – VSOU = 0.2V 0.44 0.49 0.54 V Internal Transconductance Opamp AV Open loop DC Gain(3) - - 53 - dB VCM Input common-mode range - 0.1 - 3.0 V Output Voltage Low Limit VCC = 12V, VADIM – VSOU = 0.2V - 0.6 - V Output Voltage High Limit VCC = 12V, VADIM – VSOU = 0.2V - 2.6 - V VO Gm Transconductance(3) - 400 670 1000 uA/V IBIAS Input Bias current - - 0.5 1 nA VOFFSET Input offset voltage - -5 - 5 mV I_AMP_SOURCE AMP Source Current VADIM = 2V, VSOU = 1V, VCOMP = 1.5V - -100 - uA I_AMP_SINK AMP Sink Current VADIM = 1V, VSOU = 2V, VCOMP = 1.5V - 100 - uA PWM Input VPWMI(LO) PWMI input Low voltage - - - 0.8 V VPWMI(HI) PWMI input High voltage - 2.0 - - V RPWMI PWMI pull-down resistance 50 100 200 ㏀ VPWMI = 5V PWM Output TRISE.DELAY PWMI_HIGH to DRN On Delay time - - 1.0 1.5 uS TFALL.DELAY PWMI_LOW to DRN Off Delay time - - 0.8 1.2 uS Time for internal soft-start - - 20 - mS Soft-Start TSS December 2012 Page 6 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Electrical Characteristics (Continued) Confidential Datasheet Version 1.1 VCC=12V, VPWMI=5V, CGATE=1nF, Ta=25℃, unless otherwise specified SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT - - 2 - mS 2.94 3.0 3.06 V - 2.7 - V - 200 - nS Auto Restart Protection ( OVP & LUVP & SCP ) TAR Auto Restart Time Over Voltage Protection ( OVP ) VOVP Over voltage protection VOVPH Over voltage protection release voltage TOVP OVP Filtering time(3) - Line Under Voltage Protection ( LUVP ) VLINE Line under voltage protection - 1.7 1.8 1.9 V VLINEH Line under voltage protection release voltage - - 2.0 - V TLUVP LUVP Filtering time(3) - - 200 - nS 1.8 2.0 2.2 V Short current protection ( SCP ) VADIM = 0.5V (VTH,SCP = VADIM * 4) VTH,SCP SCP Comparator threshold voltage VSCP SCP Comparator input range - 1.4 - 4.0 V TOFF Propagation time for short current detection (3) - - - 250 nS - 10 100 ohm 250 - - V Power Good Indication – Open Drain (Normal : Open, Abnormal : Internal GND) RPGOOD Power Good on resistance(3) VPGOOD = 1V Internal Dimming MOSFET BVDSS Drain-Source Breakdown Voltage ID = 250µA, VCC = 0V IDSS Drain Cut-Off Current VDS = 250V, VPWMI = 0V - - 1 uA RDS(ON) Drain-Source ON Resistance VGS = 10V, ID = 3.1A - - 1 Ω Shutdown Temperature - 150 - TSD Thermal Shutdown Temperature Hysteresis, ∆TSD - 30 - °C Note 2 : Stress beyond the maximum ratings listed above may incur permanent damage to the device. Operating above the recommended conditions for extended time may stress the device and affect device reliability. Also the device may not operate normally above the recommended operating conditions. These are stress ratings only. Note 3 : These parameters, although guaranteed by design, are not tested in mass production. December 2012 Page 7 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Electrical Characteristics (Continued) Confidential Datasheet Version 1.1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Typical Operating Characteristics Unless otherwise noted, VCC = 12V, VPWMI= 5V. Quiescent Current vs. Temp VLDO vs. Temp Operation Current vs. Temp VDD vs. Temp Fosc vs. Temp December 2012 Page 8 Confidential Datasheet Version 1.1 Current Mode Boost switching regulator operation MAP3301C is being used Current mode control scheme for boost regulation so its response is fast and output voltage is stable. Supply voltage and Oscillator MAP3301C has wide input voltage ranged from 8.5V to 33V. 1uF decoupling capacitor is used to stabilize the internal regulator and minimize noise on VCC pin. This decoupling capacitor should be placed next to VCC pin. Ceramic capacitor is recommended and incorrect placement of this decoupling capacitor may cause the oscillation in the switching waveform MAP3301C is being operated at fixed 100Khz Switching frequency and max duty is 90%. LED Current Input setting (ADIM Input) MAP3301C’s LED current is set by the voltage on ADIM pin and LED sense resistor value as below. PWM Input High (2.0V) Low (0.8V) Condition Enable Disable Enable Input MAP3301C’s offers an Enable Function. MAP3301C is enabled when EN voltage is higher than 2.0V and disabled when EN voltage is lower than 0.8V. This pin has internal 120Kohm pull down resistance EN Input High (2.0V) Low (0.8V) Condition Enable Disable Protection MAP3301C has Under Voltage Lock Out (UVLO), Boost switch current limit, Output Over Voltage Protection (OVP), Line Under Voltage Protection(LUVP), LED Short Current Protection(SCP). When OVP and LED SCP are happened, MAP3301C monitors if the failure condition is released or not every 2mS at Fs 100Khz. This is MAP3301C’s auto restart function. 1. Under Voltage Lock Out (UVLO) When VCC is higher than 8.0V, MAP3301C’s internal 5V regulator and internal circuitry like oscillator, protections, Gate drivers and PDIMO drivers are enabled, and the MAP3301C starts to operate when PWMI voltage and EN signal are higher than 2.0V. If VCC is lower than 7.0V, MAP3301C is disable due to its under voltage lock out. Fig 1. Schematic for LED current set 2. Boost current limit and Current Sense (CS) ILED = VADIM LED _ Current _ Sense _ R The voltage range on ADIM pin is 0.1V ~ 3.0V. But it is recommended that ADIM Input voltage is higher than 0.4V. The GM Amp Input VOFFSET is ±5mV. If ADIM voltage use to below 0.4V, LED current tolerance is increases. Dimming PWM Input MAP3301C’s PWMI signal is used for both Enable and PWM dimming input. MAP3301C is enabled when PWMI voltage is higher than 2.0V and disabled when PWMI voltage is lower than 0.8V. This pin has internal 100Kohm pull down resistance. December 2012 MAP3301C has the Boost current limit function. If the voltage on CS pin is higher than 0.49V (Typ.), the gate pulse is limited every pulse. MAP3301C has 100nS (Min.) leading edge blank. 3. Output Over Voltage Protection (OVP) When MAP3301C’s output voltage is increased abnormally, MAP3301C stops the switching to protect external components. MAP3301C has 200nS (Typ.) low pass filter on OVP pin, but using external Capacitor is recommended to minimize noise. The total values of ROVPH and ROVPL need to be lower than 1Mohm. Page 9 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Application Information Confidential Datasheet Version 1.1 - OVP set voltage : VO = 3.0 × ROVPH + R OVPL R OVPL 6. Auto-Restart Protection The MAP3301C offers Auto Restart protection function which is recovered into normal operation mode when protection condition is cleared. The auto restart time (TAR) is 2mS at Fs 100Khz. It is recovered to normal operating mode if SCP or OVP or LUVP condition is cleared. - OVP release voltage : VO = 2.7 × R OVPH + R OVPL R OVPL 4. Line Under Voltage Protection (LUVP) When Line voltage is low voltage input, to prevent the stress of the transition for power component, MAP3301C stops the switching to protect external components. 7. Power Good (PGOOD) MAP3301C has the PGOOD pin to send out the LED current status. PGOOD will be high when the LED current is higher than 70% of normal LED current. 1) Power Good scheme at OVP Protection. MAP3301C has 200nS (Typ.) low pass filter on LUVP pin, but using external Capacitor is recommended to minimize noise. The total values of RLUVPH and RLUVPL need to be lower than 1Mohm. LUVP threshold voltage is 2.0V and LUVP voltage can be set as below. - LUVP set voltage : VIN = 1.8 × RLUVPH + RLUVPL RLUVPL - LUVP release voltage : R + RLUVPL VIN = 2.0 × LUVPH RLUVPL When OVP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc or EN Signal 2) Power Good scheme at SCP Protection. 5. LED Short Current Protection (SCP) To protect external components, MAP3301C has the LED short protection. If the LED SCP threshold voltage changes based on ADIM voltage as below, so if SOU voltage is higher than LED SCP threshold voltage, MAP3301C will be in LED SCP mode disabling gate for boost MOSFET and dimming MOSFET. When SCP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc or EN signal. 3) PGOOD Pull up resistance is recommending over than 100Kohm. . Fig 2. SCP threshold voltage based on ADIM voltage December 2012 Page 10 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET OVP threshold voltage is 3.0V and OVP voltage can be set as below. Confidential Datasheet Version 1.1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Inductor Selection Inductor value should be decided before system design. Because the selection of the inductor affects the operating mode of CCM (Continuous current mode) or DCM (Discontinuous current mode), In CCM operation, inductor size should be bigger, even though the ripple current and peak current of inductor can be small. In DCM operation, even ripple current and peak current of inductor should be large while the inductor size can be smaller so that it is more effective in BLU of TV and Notebook application. The following is the equation to calculate max value of Inductor. L ( critical) = (1 - D)2 × D × R O(max) × TS(min) 2 Where, R0(max) = Maximum output impedance TS(min) = Minimum Switching Period L(Inductance) L(Inductance) D = 1- VIN VOUT , > L(critical) → CCM < L(critical) → DCM R O(max) = VOUT IOUT , TS(min) = 1 FS Loop Compensation The MAP3301C controls in current mode. Current mode easily achieves compensation by consisting simple single Pole from Double Pole that LC filer makes at Voltage mode In general, crossover frequency is selected from 1/3 ~ 1/6 range of the switching frequency. If fc is large, there is possibility of oscillation to occur, although time response gets better. On the other hand, if fc is small, time response will be bad, while it has improved stability, which may cause over shoot or under shoot in abnormal condition. December 2012 Page 11 Confidential Datasheet Version 1.1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Physical Dimensions MagnaChip Semiconductor Ltd. doesn’t not recommend the use of its products in hostile environments, including, without limitation, aircraft, nuclear power generation, medical appliances, and devices or systems in which malfunction of any product can reasonably be expected to result in a personal injury. Seller’s customers using or selling Seller’s products for use in such applications do so at their own risk and agree to fully defend and indemnify Seller. MagnaChip reserves the right to change the specifications and circuitry without notice at any time. MagnaChip does not consider responsibility for use of any circuitry other than circuitry entirely included in a MagnaChip product. is a registered trademark of MagnaChip Semiconductor Ltd. MagnaChip Semiconductor Ltd. 891, Daechi-Dong, Kangnam-Gu, Seoul, 135-738 Korea Tel : 82-2-6903-3451 / Fax : 82-2-6903-3668 ~9 www.magnachip.com December 2012 Page 12 Confidential Datasheet Version 1.1 MAP3301C – Single Channel LED Driver with Internal Dimming MOSFET Revision History Date Version 2012-12-07 Version 1.0 Initial Release. 2012-12-18 Version 1.1 Separate part Number. (MAP3301C & MAP3301) December 2012 Changes Page 13