SGP100

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Primary-side-control PWM controller

General Description

This highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology of SGP100 enables simplified circuit design for battery charger applications. The result is a low-cost, smaller and lighter charger than a conventional design or a linear transformer.      To minimize the standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency under light-load conditions. This green-mode function allows the power supply to meet power conservation requirements. The start-up current is only 10µA, which allows large start-up resistance for further power saving.      A charger can be implemented with few external components and minimal cost. A typical output CV/CC characteristic envelope is provided.

Product Status/Pricing/Packing

Product Product Status Eco Status *Pricing Package Type Leads Packing Method Package Drawing **Package Marking Convention RoHS IPC1752 RoHS/REACH/JIG Certificate of Compliance
SGP100SZ Last time buys being accepted ROHS Compliant SO-8 8 TAPE REEL PDF Line 1:SGP100SZ
Line 2:F3&6&3 (3-Digit Date Code)
&Z (Asm. Plant Code)
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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 protection with latch (OVP)
  • VDD under-voltage lockout (UVLO)
  • Gate output maximum voltage clamped at 18V
  • Fixed over-temperature protection with latch

Application Notes

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