OZ9991 назначение, описание, схема включения

Микросхемы OZ9991 и OZ9991A. Производитель- O2micro®

FEATURES OZ9991
• OZ9991: Input Voltage 4.6V ~ 25.0V; and 1.2MHz fi xed switching frequency
• OZ9991A: Input Voltage 3.0V ~ 7.0V; and 1MHz fi xed switching frequency
• High effi ciency DC/DC step down converter
• Integrated power MOSFET with 1A output
• 1MHz fi xed switching frequency
• Internally compensated current mode control
• Over-current and thermal protection
• Under-voltage lockout
• Soft start function

GENERAL DESCRIPTION OZ9991
OZ9991/91A are high effi ciency, DC/DC step down converters with an integrated
power MOSFET that supports 1 string of white LEDs in series.
OZ9991/91A utilize current mode control with internal slope compensation to sup-
port a wide input voltage range

Схема включения OZ9991

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