Astec AS998
The AS998/AS998A is an IC intended for use as a PWM controller for switch mode power supplies. The device is particularly suited as a primary side controller for adapter, printer, peripheral, mobile chargers and desktop auxiliary power supplies. The AS998/AS998A is manufactured in BICMOS technology and exhibits very low start-up and operating power.| Part No. | AS998 |
|---|---|
| Datasheet | AS998 Download |
| Manufacturer |  Astec |
| Description | Current Mode Controllers |
| Buy | Stock & Price |
DESCRIPTION
This allows the device to be suitable in applications where stringent standby or Blue Angel criteria are required. Many of the external functions associated with PWM controllers have been integrated into the AS998/AS998A allowing the external component count to be significantly reduced.FEATURES
such as fixed internal oscillator, internal ramp compensation and current filters all reduce the external support components.FEATURES
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● Low start-up current 64 µA (Typ) Low running current 2 mA (Typ) Low power light load mode Low power standby when OV is activated Extended commercial operating temperature range: 0 to 105°C On-board fixed frequency oscillator 100 kHz (Typ) Frequency randomizer to reduce EMC emissions Dedicated OV shutdown pin On-board voltage ramp compensation On-board current sensing filtering Optional primary side regulation Pin Configuration – Top View OV Comp VFB LI VREG 8L PDIP (8N) 1 2 3 4 M 8L SOIC (8D) OV Comp VFB ISENSE 1 2 3 4 8 7 6 5 8...
