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HT8903
9V,7A Non-Synchronous Boost Converter

The HT8903 is a non-synchronous boost converter integrated with a 60mΩ power switch to provide a high efficiency and small size solution in portable systems.

The HT8903 has an input voltage range from 2.5 V to 9V to support applications with single cell and two cell Lithium batteries. The device has 7A switch current capability and can provide an output voltage up to 9V.

A function of adjustable Current limitation is available to protect HT8903 from over current during operation, and to prevent the battery from being over-pulled caused by an overload.

The HT8903 is available in SOP8L-PP, with very limited external components, so that it provides space-saving PCB for various applications.

The HT8903 provides 10V output overvoltage protection, and thermal shutdown protection.

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FEATURES

  • Input voltage range VIN: 2.5V to 8.5V

  • Output voltage range VOUT: VIN to 9V

  • Internal Fixed PWM Frequency: 600kHz

  • Internal 60mΩ, 7A power MOSFET

  • High Efficiency

    88% (VIN = 3.7V, VOUT=7.5V, IOUT =1A)

  • Adjustable Current Limitation

  • Output overvoltage protection (at 10V), thermal shutdown protection

  • Pb-free Packages, SOP8L-PP

APPLICATIONS

  • Smart Speakers 

  • Wireless Speakers

  • Portable Speakers 

  • E-Cigarette

  • Power bank

  • Outdoor Speakers


TERMINAL FUNCTION

Terminal No.

Name

I/O

Description

1

ILIM

O

Adjustable switch peak current limit. An external resister paralleled with a 100pF capacitor should be connected between this pin and the GND pin.

2,3

SW

P

The switching node pin of the converter. 

4

VIN

I

IC power supply input.

5

EN

I

Enable logic input. Logic high level enables the device. Logic low level disables the device.

6

EAOUT

O

Error amplifier output. Connect a 3.3nF capacity paralleled with 15k resistor to GND. 

7

FB

I

Regulator Feedback Input. 

8

VOUT

I

Boost Converter voltage detect pin. 

9

GND

G

Power ground. Also provides thermal connection from the device to the board. A matching ground pad should be provided on the PCB and the device connected to it via solder.