Confidential Datasheet Version 1.0 Dual Channel High Brightness LED Driver General Description Features MAP3222 is high efficiency dual channel boost type PWM driver in single package. It is designed for high brightness LED driver optimized for backlighting system for large size LCD module. MAP3222 offers the function of accurate and fast LED dimming control using PWM interface and external dimming MOSFET. MAP3222 has the over-voltage protection, UVLO, LED short current and Boost switch current limit protection. MAP3222 is available in SOIC-20 Pin package with Halogen-free (fully RoHS compliant). For more information, please contact local MagnaChip sales office in world-wide or visit MagnaChip’s website at www.magnachip.com. Dual output into single package Wide input voltage range up to 20V PWM Dimming Current Mode Control Type Auto Restart Mode Protection Programmable Output Over Voltage Protection Programmable LED Short current Protection Boost switch current limit protection Power Good Package : SOIC-20 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 MAP3222SIRH MAP3222 -40℃ to +85℃ SOIC-20 Pin Halogen Free Typical Application March 2011. Page 1 MAP3222 – Dual Channel High Brightness LED Driver Datasheet - MAP3222 Confidential Datasheet Version 1.0 MAP3222 – Dual Channel High Brightness LED Driver Pin Configuration Pin Description PIN NO March 2011. Description 1 VCC Power Supply Input 2 PDIMO1 Ch#1 Dimming PWM Gate Driver Output 3 ISEN1 Ch#1 LED Current Sense connected to Error Amp. Inverting Input 4 PGOOD Power Good 5 COMP1 Ch#1 Error Amp. Compensation 6 OVP1 Ch#1 Over voltage protection 7 PDIMI1 Ch#1 Dimming PWM Gate Driver Input 8 CS1 Ch#1 Current sense of the Boost Convert 9 GATE1 Ch#1 Gate drive Output for Boost Convert 10 PGND Power GND 11 GATE2 Ch#2 Gate drive Output for Boost Convert 12 CS2 Ch#2 Current sense of the Boost Convert 13 NC No Connection 14 ADIM Analog Dimming for Ch#1 and Ch#2 15 PDIMI2 Ch#2 Dimming PWM Gate Driver Input 16 OVP2 Ch#2 Over voltage protection 17 COMP2 Ch#2 Error Amp. Compensation 18 ISEN2 Ch#2 LED Current Sense connected to Error Amp. Inverting Input 19 PDIMO2 Ch#2 Dimming PWM Gate Driver Output 20 SGND Signal GND Page 2 Confidential Datasheet Version 1.0 VCC 1 UVLO Comparator + 8.2V/7.2V CK Vcc Good 200KHz Oscillator - 5V BG 20 SGND 9 GATE1 10 PGND 2 PWMO1 11 GATE2 19 PDIMO2 Vref Vcc Good CK CS1 S 8 COMP1 5 ISEN1 3 LEB + R QB Gm AMP1 - Vcc Good 2.5R + PDIMI1 Q R Prot1 7 Vcc Good CK CS2 12 COMP2 17 ISEN2 18 S LEB + Q R QB Gm AMP2 - Vcc Good 2.5R + R Prot2 PDIMI2 15 ISEN1 1.25R ADIM 14 + - 3R ADIM Comparator Prot1 Vcc Good S R 13 ISEN2 + SCP1 Comparator ISEN1 + 5V - ADIM*4 Prot2 6 March 2011. Q Default “H” Prot1 ISEN2 AR 5V Protection ADIM*4 (1msec) + 3V/2.7V OVP2 S R OVP1 Comparator PGOOD 1msec Timer SCP2 Comparator + - 1.4V 1.4V OVP1 4 CK Vcc Good 3.3V Q NC 1msec Timer CK Default “H” Prot2 AR Protection (1msec) + 3V/2.7V OVP2 Comparator 16 Page 3 MAP3222 – Dual Channel High Brightness LED Driver Functional Block Diagram Confidential Datasheet Version 1.0 PARAMETER VALUE UNIT VCC -0.3 ~ 24 V GATE1/2, PDIMO1/2 -0.3 ~ 24 V PDIMI1/2, CS1/2, COMP1/2, ISEN1/2, ADIM, OVP1/2 -0.3 ~ 5.5 V PGOOD -0.3 ~ 3.5 V Operating Junction Temperature Range -40 ~ 125 ℃ Storage Temperature Range -65 ~ 150 ℃ Lead temperature(soldering, 10sec ) 260 ℃ Thermal Resistance (θJA) 90 ℃/W March 2011. Page 4 MAP3222 – Dual Channel High Brightness LED Driver Absolute Maximum Ratings Confidential Datasheet Version 1.0 SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT 8.7 - 20 V SUPPLY VCC,OP Input voltage range Ta=-40℃ ~ 85℃ IQ Operation quiescent current PDIMI 1/2 =0V - 2 4 mA IOP Operation Current PDIMI 1/2 =5V - - 20 mA Under-voltage lockout release threshold - 7.7 8.2 8.7 V Under-voltage lockout hysteresis - - 1 - V Ta= 25℃ 190 200 210 kHz Ta= -40℃ ~ 85℃ 180 200 220 kHz - 90 - % VUVLO Oscillator FOSC DMAX Oscillator frequency Maximum duty cycle - GATE (CH1, CH2) ISOURCE Gate short circuit current VGATE=0, VCC =12V 0.4 - - A ISINK Gate sink current VGATE=12V, VCC =12V 0.8 - - A TRISE GATE output rise time CGATE=1nF, VCC=12V - 50 85 ns TFALL GATE output fall time CGATE=1nF, VCC =12V - 25 45 ns 100 - 375 ns Current Sense (CH1, CH2) TBLANK Leading Edge Blanking - TDELAY Delay to output of CS comparator(2) VCOMP=5V VCS=0V to 600mV step pulse - - 180 ns VCS,MAX Maximum CS Voltage VCC=12V, VADIM – VISEN > 0.2 0.35 0.4 0.45 V Internal Transconductance Opamp (CH1, CH2) AV Open loop DC Gain(2) - - 70 - dB VCM Input common-mode range - 0.1 - 3.0 V Output Voltage Low Limit VCC=12V, VISEN – VADIM > 0.2 - 0.6 - V Output Voltage High Limit VCC=12V, VADIM – VISEN > 0.2 - 2.6 - V VO Gm Transconductance(2) - 400 670 1000 uA/V IBIAS Input Bias current - - 0.5 1 nA March 2011. Page 5 MAP3222 – Dual Channel High Brightness LED Driver Electrical Characteristics VCC=12V, VPDIMI=5V, CGATE=CPDIMO=1nF, Ta=25℃, unless otherwise specified Confidential Datasheet Version 1.0 SYMBOL PARAMETER TEST CONDITION MIN TYP MAX UNIT - -5 - 5 mV Internal Transconductance Opamp (CH1, CH2) VOFFSET Input Offset voltage I_AMP_SOURCE AMP Source Current VISEN=1V, VADIM=2V, COMP=1.5V - -100 - uA I_AMP_SINK AMP Sink Current VISEN=2V, VADIM=1V, COMP=1.5V - 100 - uA Dimming PWM Input (CH1, CH2) VPDIMI(LO) PDIMI input Low voltage - - - 0.8 V VPDIMI(HI) PDIMI input High voltage - 2.0 - - V RPDIMI PDIMI pull-down resistance 50 100 150 ㏀ V PDIMI =5V Dimming PWM Output (CH1, CH2) TRISE,PDIMO PDIMO Output rise time 1nF capacitance at PDIMO - - 300 ns TFALL,PDIMO PDIMO Output fall time 1nF capacitance at PDIMO - - 200 ns - 1 - msec 2.9 3.0 3.1 V - 0.3 - V - 200 - ns VADIM = 1V ( VTH,SCP =VADIM * 4) 3.6 4 4.4 V - 1.4 - 5.0 V - - 250 ns - 9 - ㏀ - 1.5 - ㏀ Auto Restart Protection ( OVP & SCP ) TAR Auto Restart Time - Over Voltage Protection (OVP) VOVP Over voltage protection VOVPH Over voltage protection hysteresis TOVP OVP Filtering time(2) - Short current protection ( SCP ) VTH,SCP SCP Comparator threshold voltage VSCP SCP Comparator input range TOFF Propagation time for short current detection (2) VADIM=1V, VISEN=3 to 5V step VPDIMO goes from high to low PGOOD Impedance RUP Pull-up Resistance PGOOD = 3.3V RDOWN March 2011. Pull-Down Resistance Page 6 MAP3222 – Dual Channel High Brightness LED Driver Electrical Characteristics (Continued) VCC=12V, VPDIMI=5V, CGATE=CPDIMO=1nF, Ta=25℃, unless otherwise specified Confidential Datasheet Version 1.0 Note 2: These parameters, although guaranteed by design, are not tested in mass production. March 2011. Page 7 MAP3222 – Dual Channel High Brightness LED Driver Note 1: 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. Confidential Datasheet Version 1.0 MAP3222 – Dual Channel High Brightness LED Driver Typical Operating Characteristics Unless otherwise noted, VCC = 12V, VPDIMI= 5V, and Ta = 25°C. Quiescent Current vs. Vcc March 2011. Quiescent Current vs. Temp Operation Current vs. Vcc Operation Current vs. Temp Frequency vs. Temp Under Voltage Lock Out (UVLO) Page 8 Confidential Datasheet Version 1.0 MAP3222 – Dual Channel High Brightness LED Driver Typical Operating Characteristics Unless otherwise noted, VCC = 12V, VPDIMI= 5V, and Ta = 25°C. Over Voltage Protection.(OVP) Power Good @ ADIM = 2V Short Current Protection. (SCP) @ ADIM = 0.1V March 2011. Power Good @ ADIM = 1V Power Good @ ADIM = 3V Short Current Protection. (SCP) @ ADIM = 1.0V Page 9 Confidential Datasheet Version 1.0 MAP3222 has an independent dual channel Boost type LED driver. So, it can be controlled independently. Current Mode Boost switching regulator operation MAP3222 is being used Current mode control scheme for boost regulation so its response is fast and output voltage is stable. MAP3222 is designed to be operated in DCM so MAP3222 can be unstable when it operates in CCM and duty cycle is 50% or higher. Dimming PWM Input MAP3222’s PDIMI signal is used for both Enable and PWM dimming input. MAP3222 is enabled when PDIMI voltage is higher than 2.0V and disabled when PDIMI voltage is lower than 0.8V. This pin has internal 100Kohm pull down resistance PWM Input High Low Condition Enable Disable Protection Supply voltage and Oscillator MAP3222 has wide input voltage ranged from 8.5V to 20V. 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 MAP3222 is being operated at fixed 200KHz and max duty is 90%. LED Current Input setting (ADIM Input) MAP3222’s LED current is set by the voltage on ADIM pin and LED sense resistor value as below. MAP3222 has Under Voltage Lock Out (UVLO), Boost switch current limit, Output Over Voltage Protection (OVP), LED Short Current Protection(SCP). When OVP and LED SCP are happened, MAP3222 monitors if the failure condition is released or not every 1mS. This is MAP3222’s Auto restart function. 1. Under Voltage Lock Out (UVLO) When VCC is higher than 8.2V, MAP3222’s internal 5V regulator and internal circuitry like oscillator, protections, Gate drivers and PDIMO drivers are enabled, and the MAP3222 starts to operate when PDIMI voltage is higher than 2.0V. If VCC is lower than 7.2V, MAP3222 is disable due to its Under voltage lock out. Fig 2. Schematic for Under voltage Lock out Fig 1. Schematic for LED current set I LED = VADIM LED _ Current _ Sense _ R 2. Boost current limit and Current Sense (CS) MAP3222 has the Boost current limit function. If the voltage on CS pin is higher than 0.4V (Typ.), the gate pulse is limited every pulse. MAP3222 has 100nS (Min.) leading edge blank. The voltage range on ADIM pin is 0.1V ~ 3.0V. But it is recommended that ADIM Input voltage is higher than 0.4V. March 2011. Page 10 MAP3222 – Dual Channel High Brightness LED Driver Application Information Confidential Datasheet Version 1.0 When MAP3222’s output voltage is increased abnormally, MAP3222 stops the switching to protect external components. Fig 3. Schematic for Over voltage protection MAP3222 has 200nS (Typ.) low pass filter on OVP pin, but using external Capacitor (Ca) is recommended to minimize noise. The total values of R1 and R2 need to be lower than 1Mohm. OVP threshold voltage is 3.0V and OVP voltage can be set as below. . Fig 5. SCP threshold voltage based on ADIM voltage - OVP set voltage : VO1 = 3.0 × R1 + R 2 R2 - OVP release voltage : VO1 = 2.7 × R1 + R 2 R2 Ch1: ISEN, Ch2: GATE, Ch3: PWMO, Ch3: I_LED Fig 6. LED SCP waveform 5. Auto-Restart Protection The MAP3222 offers Auto Restart protection function which is recovered into normal operation mode when protection condition is cleared. The auto restart time (TAR) is fixed at 1mS, It is recovered to normal operating mode if SCP or OVP condition is cleared. Ch1: OVP, Ch2: Gate, Ch3: Vout 6. Power Good (PGOOD) Fig 4. OVP Waveform 4. LED Short Current Protection (SCP) MAP3222 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 and will be low when the LED current is below 70%. To protect external components, MAP3222 has the LED short protection. If the LED SCP threshold voltage changes based on ADIM voltage as below, so if ISEN voltage is higher than LED SCP threshold voltage, MAP3222 will be in LED SCP mode disabling gate for boost MOSFET and dimming MOSFET. March 2011. Page 11 MAP3222 – Dual Channel High Brightness LED Driver 3. Output Over Voltage Protection (OVP) Confidential Datasheet Version 1.0 MAP3222 – Dual Channel High Brightness LED Driver 2) Power Good scheme at SCP Protection. Ch1: PDIMI, Ch2: ADIM, Ch3: ISEN, Ch4: PGOOD Fig 7. Start-up PGOOD waveform 1) Power Good scheme at OVP Protection. Ch1: PDIMO, Ch2: ADIM, Ch3: ISEN, Ch4: PGOOD Fig 9. PGOOD waveform @ SCP Protection When SCP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc. Ch1: OVP, Ch2: GATE, Ch3: VOUT, Ch4: PGOOD Fig 8. PGOOD waveform @ OVP Protection When OVP happens, PGOOD is low and latch immediately. PGOOD reset should be only shut down of IC Vcc. March 2011. Page 12 Confidential Datasheet Version 1.0 Condition : Vin=120V, Vout = 63LEDs, LED current = 130mA, OVP set = 303V, Release = 272V, SW Frequency=200KHz L1 VIN Q1-D VO1(+) VO1(+) C13 D1 C1 VCC GND GATE 1 C2 C6 VO1(+) GND2 GATE1 Q1 Q5 9 D2 GND1 8 5V 5 COMP1 CS2 CS1 C14 C8 C3 C7 OVP1 VO1(-) GND3 C4 C5 Q6 D3 14 3 7 PDIMI1 Q2 2 ADIM C12 PDIMI1 VO1(-) PDIMO2 PDIMO1 6 ISEN1 VO2(+) ISEN2 L2 C15 Q3-D VO2(+) VO2(+) COMP2 GND4 17 C17 D4 GATE2 GATE3 Q3 C9 11 OVP2 Q7 GND5 D5 C10 12 C11 CS4 CS3 PDIMI2 16 PDIMI2 C18 4 GND6 C16 15 13 Active High GND7 VO2(-) VO2(-) 19 18 10 Q4 Q8 20 D6 SGND SGND1 PGND PDIMO4 PDIMO3 ISEN3 ISEN4 C19 GND8 Evaluation Board Part List Spec Input Capacitor Output Capacitor 10uF/400V 10uF/400V Vendor P/N 1 RD22uF/400V 1 RD10uF/400V SAMWHA SAMWHA 2 Inductor 150uH ABCO LPF1280-151 Boost MOSFET 3A/400V, N-Ch, SOT223 MagnaChip MDHT3N40 Dimming MOSFET 3A/400V, N-Ch, SOT223 MagnaChip MDHT3N40 Ultrafast Diode 1A/1000V VISHAY UF4007 IC PWM Controller MagnaChip MAP3222 1. SAMWHA : 1) ELECTROLYTIC CAPACITOR, SAMWHA ELECTRIC tel : +82-43-261-0200, http://www.samwha.co.kr/electric 2) MLCC CAPACITOR, SAMWHA CAPACITOR tel : +82-31-330-5872, http://www.samwha.co.kr/capacitor 2. ABCO tel : +82-31-730-5000, http://www.abco.co.kr March 2011. Page 13 MAP3222 – Dual Channel High Brightness LED Driver Evaluation Board Schematic Confidential Datasheet Version 1.0 MAP3222 – Dual Channel High Brightness LED Driver 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 March 2011. Page 14 Confidential Datasheet Version 1.0 MAP3222 – Dual Channel High Brightness LED Driver Revision History March 2011. Date Version 2011-03-18 Version 1.0 Changes Initial release Page 15