HT7463B

HOLTEK Semiconductor Inc.
HT7463A/HT7463B 52V/600mA, 1.25MHz/550kHz Asynchronous Step Down Converter Features • Pre-Regulator for Linear Regulators • Wide Input Voltage Range 4.5V to 52V General Description • 52V / 0.9Ω Internal Power MOSFET • 600mA Peak Output Current The HT7463A/B is a current mode buck converter. With a wide input range from 4.5V to 52V, the HT7463A/B is suitable for a wide range of applications...
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HT7463A/HT7463B 52V/600mA, 1.25MHz/550kHz Asynchronous Step Down Converter Features • Pre-Regulator for Linear Regulators • Wide Input Voltage Range 4.5V to 52V General Description • 52V / 0.9Ω Internal Power MOSFET • 600mA Peak Output Current The HT7463A/B is a current mode buck converter. With a wide input range from 4.5V to 52V, the HT7463A/B is suitable for a wide range of applications such as power conditioning from unregulated sources. Having a low internal switch typical RDSON value of 0.9Ω, the device has a good operating typical efficiency value of 85% and the added advantage of reduced junction temperature. The operating frequency is fixed at 1250/550kHz for the HT7463A/HT7463B respectively. The HT7463A allows the use of small external components while still being able to have low output voltage ripple. A soft-start function can be implemented using the enable pin and by connecting an external RC circuit allowing the user to tailor the soft-start time to a specific application. • Up to 90% Efficiency • 1.25MHz (HT7463A) and 550kHz (HT7463B) Fixed Operating Frequency • Ultra Low Shutdown Current < 1µA • Output Short Circuit Protection • Thermal Shutdown Protection • Package Type: 6-pin SOT23 Applications • Power Meters • Distribution Power Systems • Battery Chargers Application Circuit CB 0.1µF L1 *3 VOUT=12V *2 D1 HT7463A/B 1 2 3 CB SW GND VIN FB EN 4 R2 6kΩ / ±1% C3 0.1µF 6 5 C4 22µF *1 VIN On/Off Control C1 0.1µF C2 100µF R1 84kΩ / ±1% Note: *1. C4=330μF is recommended to achieve 1‰ output ripple requirement *2. Set R1=84kΩ and R2=6kΩ for VOUT=12V application *3. Typically recommended that L1=22µH for HT7463A and L1=47µH for HT7463B. Electromagnetic interference situation suggest L1=100µH or more Rev. 1.60 1 March 30, 2021 PDF
Документация на HT7463B 

Дата модификации: 30.03.2021

Размер: 1.66 Мб

16 стр.

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