Electrical and electronic equipment (EEE) > Power management components > PWM controllers > Radiation-hardness-assured (RHA), 30-V, 1-A, PWM controller with 8.4-V/7.6-V UVLO 100% duty cycle
Key highlights
The Texas Instruments UC1843B-SP is a Current Mode PWM Controller suitable for communication, optical and RADAR imaging payload applications. The component is radiation hardened and features pulse-by-pulse current limiting, trimmed oscillator discharge current, low start-up current and an internally-trimmed bandgap reference.
Applications
- DC-DC converters (external)
- Communications payload (external)
- Optical imaging payload (external)
- Radar imaging payload (external)
- Supports various topologies:
- Flyback, forward (external), buck, boost (external)
- Push-pull, half-bridge, full-bridge with external interface circuit
Orderable Part Numbers
- 5962R8670412V9A
- 5962R8670412VYC (external)
- UC1843BHKU/EM (external)
Key features
- 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 RO error amplifier
Reference designs
- TIDA-070002 - 20- to 40-VIN, 50-W Space-grade isolated flyback DC/DC over-current protection reference design
Testing & qualification
Below are the technical documentations available for this product:
- Radiation & reliability report
- Single-Event Effects Test Report of the UC1843B-SP Current Mode PWM Controller (external)
- UC1843B-SP Neutron Displacement Damage (NDD) Characterization (external)
- UC1843B-SP total ionizing dose (TID) radiation report (external)
- Application note
- Single-Event Effects Confidence Interval Calculations (external)
- Heavy Ion Orbital Environment Single-Event Effects Estimations (external)
- Selection guide
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Last updated: 2025-05-02
UC1843B-SP
Radiation-hardness-assured (RHA), 30-V, 1-A, PWM controller with 8.4-V/7.6-V UVLO 100% duty cycle
Technical specs
supply voltage
< 25 V
frequency
< 500 kHz
operating temperature
-55 to 125 C
RoHS compliance
yes
REACH compliance
yes
export control
EAR99
Export
