PAM2842TJR

NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 HIGH POWER LED DRIVER Description Pin Assignments The PAM2842 is a high power LED driver, capable of driving up to 10 high power LEDs in series. The PAM2842 supports buck, boost and sepic topology. The PAM2842 features over current protection, over voltage protection, under voltage lockout and over temperature protection, which prevent the device from damage. LED dimming can be done by using a PWM signal to the COMP pin. The PAM2842 is available in TSSOP-20 packages. Features             Output Power up to 30W Chip Enable with Soft-start Analog and PWM Dimming Peak Efficiency up to 97% Low Quiescent Current Switching Frequency Adjustable Support Buck/Boost/Sepic Toplogy Over Current Protection Over Voltage Protection Thermal Protection UVLO Tiny Pb-Free Packages: 40-Pin QFN6x6 and TSSOP-20 Applications PAM2842 Document number: DS36412 Rev. 2 - 3  Home Lighting   Automotive Lighting Monitor Backlighting 1 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Typical Applications Circuit Boost with Low Side Current Sense Boost with High Side Current Sense Buck/Boost (Sepic) with Low Side Current Sense Buck/Boost (Sepic) with High Side Current Sense Buck with High Side Current Sense PAM2842 Document number: DS36412 Rev. 2 - 3 2 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Pin Descriptions Pin Name PGND HVIN EN VDD-DR RT AGND SenseSense+ COMP VDD_5V OV SW NC Pin Number QFN6x6-40 TSSOP-20 1–6 1, 2, 3, 4, 10, 11 8 5 9 6 10 7 12 8 13 9 14 12 15 13 17 14 21 15 23 16 25 – 30 17, 18, 19 7, 11, 16, 18-20, 20 22, 24, 31-40 Function Power Ground Input Chip Enable, Active High Internal LDO Output Frequency Adjustment Pin Analog Ground Sense Resistor Sense Resistor+ Compensation Node Internal LDO Output Over Voltage Drain of Main Switch Not Connected Functional Block Diagram PAM2842 Document number: DS36412 Rev. 2 - 3 3 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may affect device reliability. All voltages are with respect to ground. Parameter Supply Voltage Buck Application Maximum Output Current I/O Pin Voltage Range Rating 40 3 Unit V A GND -0.3 to VDD +0.3 V 150 -40 to +150 300, 5s °C Maximum Junction Temperature Storage Temperature Soldering Temperature Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.) Parameter Supply Voltage Range Operation Temperature Range Junction Temperature Range Rating Unit 5.5 to 40 -40 to +85 -40 to +125 V °C Thermal Information Parameter Thermal Resistance (Junction to Case) Thermal Resistance (Junction to Ambient) Note: Package TSSOP-20 QFN6x6-40 TSSOP-20 QFN6x6-40 Symbol θJC θJA Max Unit 20 7.6 (Note 1) °C/W 90 18.1 (Note 1) 1. The exposed PAD must be soldered to a thermal land on the PCB. Electrical Characteristics (@TA = +25°C, VEN = VDD = 24V, 1W x 10 LEDs, unless otherwise specified.) Parameter Input Voltage Range Quiescent Current E NA = high (no switching frequency) E NA = high (1M switching frequency) E NA = high (500k switching frequency) E NA = high (200k switching frequency) E NA = low Min 5.5 - Typ 1 6 3 1.6 5 Max 40 2 10 Unit V mA mA mA mA µA Feedback Voltage, Low Side VFB = VSENSE+ -AGND, VSENSE- = AGND 95 100 105 mV Feedback Voltage, High Side VFB = VSENSE+ – VSENSE- 95 100 105 mV LED Current Line Regulation IO = 350mA - 0.02 - %/V LED Current Load Regulation VDD_DR UVLO Hysteresis No Switching - 1.0 200 - % mV PAM2842 Document number: DS36412 Rev. 2 - 3 Test Conditions 4 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Electrical Characteristics (cont.) (@TA = +25°C, VEN = VDD = 24V, 1W x 10 LEDs, unless otherwise specified.) Parameter Test Conditions Min Typ Max Units LDO Stage VDD_5V VDD_5V Current Limit VDD_5V UVLO Threshold VDD_5V UVLO Hysteresis VDD_DR VDD_DR Current_Limit VDD_DR UVLO Threshold Switch Stage Switch RDS(ON) Switch Current Limit Switch Leakage Current No Switching No Switching No Switching No Switching No Switching No Switching No Switching 4.5 14 3.7 4.5 14 3.7 5 74 4.0 200 5 50 4.0 5.5 90 4.3 5.5 90 4.3 V mA V mV V mA V VDD_5V = 5V - - 0.1 3.5 50 - Ω A µA RT Voltage RRT = 71kΩ 1.1 1.2 1.3 V RRT = 30kΩ 800k 1M 1.2M Hz RRT = 71kΩ 400 500 600 kHz RRT = 180kΩ 160 200 240 kHz FSW = 1MHz - 10 - % FSW = 500kHz - 5 - % FSW = 200kHz - 2.5 - % Low Side Sense High Side Sense Feedback Voltage = 0 Feedback Voltage = 0 - 95 100 30 30 - % % µA µA Switching Frequency (Note 2) Min Duty Cycle Max Duty Cycle VC Source Current VC Sink Current Fault Protection OV Threshold Voltage OV Hysteresis Thermal Shutdown Thermal Shutdown Hysteresis Control Interface - 1.1 - 1.2 70 +150 +30 1.3 - V mV °C °C EN High EN Low - 1.5 - - 0.4 V V Note: 2. Switching frequency FSW  PAM2842 Document number: DS36412 Rev. 2 - 3 1012 24 x(RRT  12k ) , reference value. 5 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Typical Performance Characteristics Boost Mode, @TA = +25°C, VEN = VDD = 24V, 3W LEDs, FSW = 200kHz, unless otherwise specified.) PAM2842 Document number: DS36412 Rev. 2 - 3 6 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Typical Performance Characteristics (cont.) @TA = +25°C, FSW = 300kHz, unless otherwise specified.) PAM2842 Document number: DS36412 Rev. 2 - 3 7 of 17 www.diodes.com April 2018 © Diodes Incorporated NOT RECOMMENDED FOR NEW DESIGN USE ZXLD1371 PAM2842 Application Information Topology Selection When maximum power supply voltage is below than minimum load voltage, select the boost topology. When minimum power supply voltage is high than maximum load voltage, select buck topology. When load voltage range is small and between the power supply voltage, select sepic topology. Table 1: Voltage Condition vs. Topology Condition Topology VINMAX < VOMIN Boost VINMIN > VOMAX Buck VO