| Topology | Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull |
| Duty cycle (Max) (%) | 50 |
| Vin (Max) (V) | 40 |
| UVLO thresholds on/off (V) | 7.7/6.95 |
| Features | Error Amplifier, Multi-topology, Soft Start, Synchronization Pin |
| Operating temperature range (C) | -55 to 125 |
| Switching frequency (Max) (kHz) | 500 |
| Rating | Space |
| Gate drive (Typ) (A) | 0.5 |
- QML-V Qualified, SMD 5962-86806
- 5962P8680603VxA:
- Radiation Hardness Assurance (RHA) up to 30-krad(Si) Total Ionizing Dose (TID)
- Passes Functional and Specified Post-Radiation Parametric Limits at 45 krad at LDR (10 mrad(Si)/s) per 1.5× Over Test as Defined in MIL-STD-883 Test Method 1019.9 Paragraph 3.13.3.b
- Exhibits Low-Dose Rate Sensitivity but Remains Within the Pre-Radiation Electrical Limits at 30-krad Total Dose Level, as Allowed by MIL-STD-883, TM1019
- Automatic Feed-Forward Compensation
- Programmable Pulse-by-Pulse Current Limiting
- Automatic Symmetry Correction in Push-Pull Configuration
- Enhanced Load Response Characteristics
- Parallel-Operation Capability for Modular Power Systems
- Differential Current-Sense Amplifier With Wide Common-Mode Range
- Double-Pulse Suppression
- 500-mA (Peak) Totem-Pole Outputs
- ±1% Bandgap Reference
- Undervoltage Lockout (UVLO)
- Soft-Start Capability
- Shutdown Terminal
- 500-kHz Operation
The UC1846-SP control devices provide all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel power modules while maintaining equal current sharing.
Protection circuitry includes built-in UVLO and programmable current limit in addition to soft-start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off.
Other features include fully latched operation, double-pulse suppression, deadline adjust capability, a ±1% trimmed bandgap reference, and low outputs in the OFF state.
