SGP100 - Primary-side-control PWM Controller

System General

General Description

This highl y int egrated PWM c ontroller p rovides s everal

Key Features

Constant-voltage (CV) and constant-current (CC) control without secondary-feedback circuitry Green-mode function: PWM frequency linearly decreasing Fixed PWM frequency at 42kHz with frequency hopping to solve EMI problems Low start-up current: 10μA (typical) Low operating current: 6.5mA (typical) Peak-current-mode control in CV mode Cycle-by-cycle current limiting VDD over-voltage protec.

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SGP100 primary-side-control pwm controller by System General - Datasheet Preview

Datasheet Details

Part number	SGP100
Manufacturer	System General
File Size	617.50 KB
Description	Primary-side-control PWM Controller
Datasheet	SGP100 Datasheet

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Product Specification Primary-side-control PWM Controller SGP 100 applications. The result is a low-cost, smaller and lighter charger than a conventional design or a linear transformer. To minimize t he s tandby po wer co nsumption, t he proprietary g reen-mode funct ion pr ovides o ff-time modulation t o linea rly d ecrease P WM f requency under light-load conditions. Th is green-mode fun ction all ows the power s upply to meet p ower conservation requirements. The s tart-up curr ent i s onl y 10µA, which allows large start-up resistance for further power saving. A charger ca n be implemented w ith few ex ternal components a nd mi nimal c ost. A t ypical output C V/CC characteristic envelope is shown in Figure 1.