MAX16831ATJ+ Maxim Integrated Products, MAX16831ATJ+ Datasheet
MAX16831ATJ+
Specifications of MAX16831ATJ+
Related parts for MAX16831ATJ+
MAX16831ATJ+ Summary of contents
Page 1
... Programmable Switching Frequency (125kHz to 600kHz) and Synchronization o Output Overvoltage Load Dump, LED Short, Overtemperature Protection o Low 107mV LED Current Sense for High Efficiency o Enable/Shutdown Input with Shutdown Current Below 45µA PART MAX16831ATJ+ + Denotes a lead(Pb)-free/RoHS-compliant package Exposed pad. Applications UV2 R UV1 ...
Page 2
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control ABSOLUTE MAXIMUM RATINGS V , HI, LO, CLMP to QGND .................................-0.3V to +80V CC CS+, CS-, DGT, UVEN to QGND............................-0.3V to +80V UVEN to QGND ..........................................-0. DRV to ...
Page 3
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control ELECTRICAL CHARACTERISTICS (continued 14V 1µ UVEN REG1 REG2 Typical specifications are +25°C.) A PARAMETER SYMBOL CLMP Regulator Output Voltage ...
Page 4
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control ELECTRICAL CHARACTERISTICS (continued 14V 1µ UVEN REG1 REG2 Typical specifications are +25°C.) A PARAMETER SYMBOL ERROR AMPLIFIER FB Input ...
Page 5
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control ELECTRICAL CHARACTERISTICS (continued 14V 1µ UVEN REG1 REG2 Typical specifications are +25°C.) A PARAMETER SYMBOL THERMAL SHUTDOWN Thermal Shutdown ...
Page 6
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control ( 14V 1µ UVEN REG1 REG2 REG2 OUTPUT VOLTAGE vs. TEMPERATURE 7.10 7.05 7.00 6.95 6.90 6. 20mA REG2 6.80 -60 ...
Page 7
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control ( 14V 1µ UVEN REG1 REG2 PWM OSCILLATOR FREQUENCY vs. 1/RT CONDUCTANCE 550 500 450 400 350 300 250 200 150 100 0.005 ...
Page 8
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control PIN NAME 1, 24 N.C. No Connection. Not internally connected. Undervoltage Lockout (UVLO) Threshold/Enable Input. UVEN is a dual-function adjustable UVLO threshold input with an enable feature. Connect UVEN to ...
Page 9
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control PIN NAME Low-Voltage Input the return point for the LED current. When using the MAX16831 in a buck- boost configuration, connect connect LO ...
Page 10
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control The MAX16831 features a differential high-side level shifter to drive an external n-channel MOSFET for dim- ming. Wide contrast “pulsed” dimming (1000:1) is pos- sible by applying either a low-frequency ...
Page 11
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control Reference Voltage Output The MAX16831 includes a 5% accurate 3V (typ) buffered reference output, REF. REF is a push-pull out- put capable of sourcing/sinking 100µA of current and can drive ...
Page 12
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control Connect the clock signal to the RTSYNC input. The MAX16831 synchronizes to the external clock signal after the detection of five successive clock edges at RTSYNC. A buffered clock output, ...
Page 13
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control capacitor to hold the charge when the DIM signal has turned off the gate drive. When DIM is high again, the voltage on the compensation capacitors, C1 and C2, will ...
Page 14
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control Applications Information Inductor Selection The minimum required inductance is a function of oper- ating frequency, input-to-output voltage differential, and the peak-to-peak inductor current (ΔI allows for a lower inductor value ...
Page 15
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control When using the MAX16831 in a boost or buck-boost configuration, the input RMS current is low and the input capacitance can be small. Operating the MAX16831 Without the The MAX16831 ...
Page 16
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control V CC UVLO AND EN UVEN THERMAL SHUTDOWN QGND REG1 - V REF BUF 3.0V + RTSYNC OSC OSC CLKOUT OVP DIM COMP + ...
Page 17
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control BOOST CONFIGURATION UV2 V CS+ DGT CC R UV1 UVEN C UVEN REF R 3 DIM RTSYNC REG1 ...
Page 18
High-Voltage, High-Power LED Driver with Analog and PWM Dimming Control BUCK CONFIGURATION UV2 R UV1 UVEN C UVEN DIM DIM REG1 C REG1 R T RTSYNC COMP Chip Information PROCESS: BICMOS 18 ______________________________________________________________________________________ Typical Operating Circuits (continued) ...
Page 19
... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...