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SIP11206 Datasheet(PDF) 1 Page - Vishay Siliconix |
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SIP11206 Datasheet(HTML) 1 Page - Vishay Siliconix |
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1 / 19 page  Vishay Siliconix SiP11206 Document Number: 69232 S-81795-Rev. C, 04-Aug-08 www.vishay.com 1 Half-Bridge Controller with Primary MOSFET Drivers for Intermediate Bus Converters FEATURES • 36 V to 75 V input voltage range • Withstand 100 V, 100 ms transient capability • Integrated ± 1.6 A typical high- and low-side MOSFET drivers • Oscillator frequency is programmable from 200 kHz to 1 MHz and can be externally synchronized • High voltage pre-regulator operates during start-up • Current sensing on primary low-side switch • Hiccup mode • System low input voltage detection • Chip UVLO function • Programmable soft-start function • Over temperature protection (160 °C) • Greater than 95 % efficiency APPLICATIONS • Intermediate bus architectures • Telecom and Datacom • Routers and servers • Storage area network • Base station • 1/8 and 1/4 bricks DESCRIPTION SiP11206 is a controller for the primary side of a half-bridge intermediate bus converter (IBC). It is ideally suited for isolated applications such as telecom, data communications and other products requiring an IBC architecture and conversion of standard bus voltages such as 48 V to a lower intermediate voltage, where high efficiency is required at low output voltages (24 V, 12 V, 9 V or 5 V). Designed to operate within the telecom voltage range of 36 V to 75 V and withstand 100 V transients for a period of 100 ms, the IC is designed for controlling and driving both the low- and high-side switching devices of a half-bridge converter. The SiP11206 operates with a fixed duty cycle to provide the highest efficiency over a wide input voltage range. SiP11206 has advanced current monitoring and control circuitry, which allows the user to set the maximum current in the primary circuit. This feature acts as protection against overcurrent, output short circuit. Current sensing is by means of a sense resistor connected in series with the primary low-side MOSFET. TYPICAL APPLICATION CIRCUIT Vo- Vin+ Vo+ Vin- VINDET 1 VIN 2 VCC 3 COMP 4 CS 5 AGND 6 VREF 7 ROSC 8 BST 16 DH 15 LX 14 DL 13 PGND 12 SS 11 RDB 10 COSC 9 SiP11206 36 V to 75 V 100 V/100 ms RDB |
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