UC1843B-SP Series

Radiation-hardened QMLV, 30-V input, 1-A single-output 500-kHz PWM controller, 100% duty cycle

Catalog

Radiation-hardened QMLV, 30-V input, 1-A single-output 500-kHz PWM controller, 100% duty cycle

Part	Package / Case	Mounting Type	Current - Supply	Voltage - Input [Max]	Voltage - Input [Min]	Supplier Device Package	Voltage - Supply [Max]	Voltage - Supply [Min]	Applications	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments UC1843BHKU/EM	10-CDFF	Surface Mount	11 mA	6.3 V	-3 V	10-CFP	25 V	12 VDC	PWM Controller	125 °C	-55 °C

Catalog

Radiation-hardened QMLV, 30-V input, 1-A single-output 500-kHz PWM controller, 100% duty cycle

Description

The UC1843B-SP control IC is a radiation hardened pin-for-pin compatible version of the UC1843A-SP. Providing the necessary characteristics to control current-mode switched-mode power supplies, this device has improved features. Start-up current is specified to be less than 0.5 mA and oscillator discharge is trimmed to 8.3 mA. During UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCCover 5 V. The UC1843B-SP control IC is a radiation hardened pin-for-pin compatible version of the UC1843A-SP. Providing the necessary characteristics to control current-mode switched-mode power supplies, this device has improved features. Start-up current is specified to be less than 0.5 mA and oscillator discharge is trimmed to 8.3 mA. During UVLO, the output stage can sink at least 10 mA at less than 1.2 V for VCCover 5 V.