UC1843B-SP Texas instruments

UC1843B-SP

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UC1843B-SP

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Описание

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 VCC over 5 V.

QML class V (QMLV) qualified, SMD 5962-86704
5962R8670412VYC:
- Radiation hardness assurance (RHA) up to 100-krad(Si) total ionizing dose (TID)
Optimized for offline and DC-to-DC converters
Low start-up current (< 0.5 mA)
Trimmed oscillator discharge current
Automatic feed forward compensation
Pulse-by-pulse current limiting
Enhanced load response characteristics
Undervoltage lockout (UVLO) with hysteresis
Double-pulse suppression
High-current totem-pole output
Internally-trimmed bandgap reference
500-kHz operation
Low R_O error amplifier

Product type	Controller
Rating	Space
Operating temperature range (°C)	-55 to 125, 25 to 25