HT7963

HOLTEK Semiconductor Inc.
HT7963 LED Backlight Driver Features General Description • Integrated high power boost DC-DC controller The HT7963 is a high efficiency boost converter with a fixed oscillator frequency for LED backlighting and LED lighting application. The white LED current is setup using an external current setting resistor, which has a low feed-back voltage of only 0.3V. The DIM input allows a wide range ...
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HT7963 LED Backlight Driver Features General Description • Integrated high power boost DC-DC controller The HT7963 is a high efficiency boost converter with a fixed oscillator frequency for LED backlighting and LED lighting application. The white LED current is setup using an external current setting resistor, which has a low feed-back voltage of only 0.3V. The DIM input allows a wide range of dimming control for LED backlighting or LED lighting. The device offers a full range of protection functions such as power MOSFET over current protection (OCP), IC power supply under voltage lockout (UVLO), over-voltage protection (OVP), output voltage short circuit protection (OSP) and over temperature protection (OTP). • Wide input voltage range from 9V to 30V • High Voltage Gate-Drive provides lower RDS(ON) and higher efficiencies • Dimming frequency from 100Hz to 1kHz • 0.3V LED feedback current sensing voltage with ±3% tolerance • Device protection features include: Soft-start, OCP, UVLO, OVP, OTP and output short protection – OSP • LED protection: LED Open/Short Protection • Package type: 8-pin SOP Applications • LED Backlighting for LCD TV/Monitor • LED lighting Typical Application Circuit D1 L VIN = 12V~24V VOUT 47uH CIN 220uF COUT 51Ω 47uF R1 10kΩ PWM RC 47KΩ 1 VIN 8 DIM 6 COMP 3 GND HT7963 DRV 2 CS 4 OVP 7 FB 5 0.1uF RCS 10pF R2 optional 100Ω ILED= 0.3V RFB optional 100Ω RFB CC 33nF CFB 470pF Note: The VOUT/VIN ratio is suggested to be lower than 5 to gain better dimming linearity. Rev. 1.00 1 August 14, 2015 PDF
Документация на HT7963 

Дата модификации: 01.03.2017

Размер: 1.39 Мб

11 стр.

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