DatasheetsPDF.com

APW7228B

ANPEC
Part Number APW7228B
Manufacturer ANPEC
Description 4-Channel LED Backlight Controller
Published Aug 17, 2020
Detailed Description APW7228B 4-Channel LED Backlight Controller Features General Description • 4 Channels • 5.5V to 30V Input Voltage Su...
Datasheet PDF File APW7228B PDF File

APW7228B
APW7228B

Overview
APW7228B 4-Channel LED Backlight Controller Features General Description • 4 Channels • 5.
5V to 30V Input Voltage Supply • Drive up to 68 (17x4) White LEDs The APW7228B is a high efficiency driver for 4 channels of LEDs.
It contains an adjustable-frequency currentmode PWM step-up controller, a 5V linear regulator, dim- (3.
5V/160mA Each) ming control circuit and eight regulated current source • Current Match (Balance) ±1% (Typ.
) circuit.
• Current Accuracy ±1% (Typ.
) The APW7228B is capable of driving typically 68 (4x17) • External PWM Input from 100Hz to 50kHz Dim- pieces of 3.
5V/160mA LEDs.
It contains 4 channels of ming Frequency voltage controlled current sources with typical currents • Time Shift PWM Dimming Control matching of +1%, which compensate for the non-unifor- • Random Channel Selection for Dynamic Opera- mity effect of forward voltages variance in the LED stacks.
tions • Adjustable Switching Frequency • Protections To minimize the voltage headroom and power loss in the typical multi-strings operation, the APW7228B features a dynamic headroom control that monitors the highest LED - String Open Circuit Detection forward voltage string and uses its feedback signal for - String Short Circuit Detection output regulation.
- Over-Temperature Protection The APW7228B features extensive protection functions - Over-Voltage Protection that include LED strings open and short circuit detections, • Available in TSSOP-16P, SOP-16, DIP-16 and Output Over-Voltage Protection (OVP) and Over-Tempera- QFN4x4-16A Packages • Lead Free and Green Devices Available ture Protection (OTP).
The APW7228B is available in TSSOP-16P, SOP-16, DIP- (RoHS Compliant) 16 and QFN4x4-16A package.
Applications • NB LED Backlight • LCD Monitor Backlight • LCD TV LED Backlight Simplified Application Circuit VIN VOUT ENA PWM APW7228B ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to o...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)