BL8802B

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BL8802B CC/CV Primary-Side Power Switch GENERAL DESCRIPTION FEATURES BL8802B is a high performance offline PSR power switch for low power AC/DC charger and adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler andTL431 could be eliminated. Proprietary ConstantVoltage (CV) and Constant Current (CC) control isintegrated as shown in the figure below...
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Технические характеристики

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Корпус DIP-8 DIP7
Топология Регулятор со встроенным ключом
Максимальная частота преобразователя
Примечание
Рабочая температура
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BL8802B CC/CV Primary-Side Power Switch GENERAL DESCRIPTION FEATURES BL8802B is a high performance offline PSR power switch for low power AC/DC charger and adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler andTL431 could be eliminated. Proprietary ConstantVoltage (CV) and Constant Current (CC) control isintegrated as shown in the figure below. In CC control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation.Device operates in PFM in CC mode at large load condition and it operates in PWM with frequency reduction at light/medium load. The chip consumes very low operation current. It achieves less than 75mW standby power to meet strict standby power standard. BL8802B offers comprehensive protection coverage with auto-recovery feature including Cycle-by-Cycle current limiting, VDD over voltage protection, feedback loop open protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), OTP etc. ■ Primary-side sensing and regulation withoutTL431 and opto-coupler ■ High precision constant voltage and current regulation at universal AC input ■ Multi-mode PWM/PFM operation for efficiency improving ■ Integrated 2A 1000V MOSFET ■ Good dynamic response with synchronous rectifier application ■ Programmable CV and CC regulation ■ Built-in primary winding inductance compensation ■ ■ ■ ■ ■ ■ Comprehensive protection coverage with auto-recovery  On-chip OTP  VDD over voltage protection  VDD under voltage lockout with hysteresis (UVLO)  Cycle-by-Cycle current limiting  Feedback loop open protection  Output short circuit protection APPLICATIONS Low Power AC/DC offline SMPS for ■ Industrial instruments: single / three-phase meters ■ Outdoor monitoring / protection equipment ■ AC / DC with high input voltage BL8802B is offered in DIP-7 packages. VO ±5% ICC Programmable cable drop compensation No need for control loop compensation Audio noise free operation Built-in leading edge blanking (LEB) Ultra low start-up current and low operating current IO Typical CC/CV Curve 1 PDF
Документация на BL8802B 

Дата модификации: 18.09.2023

Размер: 755.4 Кб

11 стр.

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