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MAX16802A

Maxim Integrated Products
Part Number MAX16802A
Manufacturer Maxim Integrated Products
Description Offline and DC-DC PWM Controllers
Published Apr 28, 2010
Detailed Description 19-3880; Rev 2; 1/10 KIT ATION EVALU E L B A AVAIL www.DataSheet4U.com Offline and DC-DC PWM Controllers for High-Bri...
Datasheet PDF File MAX16802A PDF File

MAX16802A
MAX16802A

Overview
19-3880; Rev 2; 1/10 KIT ATION EVALU E L B A AVAIL www.
DataSheet4U.
com Offline and DC-DC PWM Controllers for High-Brightness LED Drivers General Description Features ♦ Suitable for Buck, Boost, Flyback, SEPIC, and Other Topologies ♦ Up to 50W or Higher Output Power ♦ Universal Offline Input Voltage Range: Rectified 85VAC to 265VAC (MAX16801) ♦ IN Pin Directly Driven From 10.
8VDC to 24VDC Input (MAX16802) ♦ Internal Error Amplifier with 1% Accurate Reference for Precise LED Current Regulation ♦ PWM or Linear Dimming ♦ Fixed Switching Frequency of 262kHz ±12% ♦ Thermal Shutdown ♦ Digital Soft-Start ♦ Programmable Input Startup Voltage ♦ Internal Bootstrap UVLO with Large Hysteresis (MAX16801) ♦ 45µA (typ) Startup Supply Current, 1.
4mA (typ) Operating Supply Current ♦ 50% (MAX16801A/MAX16802A) or 75% (MAX16801B/MAX16802B) Maximum Duty Cycle ♦ Available in a Tiny 8-Pin µMAX Package MAX16801A/B/MAX16802A/B The MAX16801A/B/MAX16802A/B high-brightness (HB) LED driver-control ICs contain all the circuitry required for the design of wide-input-voltage-range LED drivers for general lighting and display applications.
The MAX16801 is well suited for universal input (rectified 85VAC to 265VAC) LED drivers, while the MAX16802 is intended for low-input-voltage (10.
8VDC to 24VDC) LED drivers.
When the LED current needs to be tightly regulated, an additional on-board error amplifier with 1% accurate reference can be utilized.
A wide dimming range can be implemented by using low-frequency PWM dimming.
The MAX16801/MAX16802 feature an input undervoltage lockout (UVLO) for programming the input-supply start voltage, and to ensure proper operation during brownout conditions.
The MAX16801 has an internal-bootstrap undervoltage lockout circuit with a large hysteresis that simplifies offline LED driver designs.
The MAX16802 does not have this internal bootstrap circuit and can be biased directly from a +12V rail.
The 262kHz fixed switching frequency is internally trimmed, allowing for...


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