Purchase UC3823B, In-stock UC3823B From SeekIC.
Part Number: UC3823B
Description: The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of...
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UC3823B
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DataSheet
General Description
UC3823B General Description
The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 µA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of 2-A peak currents during transitions.
UC3823B Maximum Ratings
|
UNIT | |||
|
VIN |
Supply voltage, | VC, VCC |
22V |
|
IO |
Source or sink current, DC | OUTA, OUTB |
0.5A |
|
IO |
Source or sink current, pulse (0.5 s) | OUTA, OUTB |
2.2A |
| Analog inputs | INV, NI, RAMP |
−0.3 V to 7 V | |
| ILIM, SS |
−0.3 V to 6 V | ||
| Power ground | PGND |
±0.2 V | |
|
ICLK |
Clock output current | CLK/LEB |
−5 mA |
|
IO(EA) |
Error amplifier output curre | EAOUT |
5 mA |
|
ISS |
Soft-start sink current | SS |
20 mA |
|
IOSC |
Oscillator charging current | RT |
−5 mA |
|
TJ |
Operating virtual junction temperature range |
−55 to 150 | |
|
Tstg |
Storage temperature |
−65 to 150 | |
| Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
−55 to 150 | ||
|
TSTG |
Storage temperature |
−65 to 150 | |
| Lead temperature 1,6 mm (1/16 inch) from cases for 10 seconds |
300 | ||
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
UC3823B Features
Improved Versions of the UC3823/UC3825 PWMs
Compatible with Voltage-Mode or Current-Mode Control Methods
Practical Operation at Switching Frequencies to 1 MHz
50-ns Propagation Delay to Output
High-Current Dual Totem Pole Outputs (2-A Peak)
Trimmed Oscillator Discharge Current
Low 100-µA Startup Current
Pulse-by-Pulse Current Limiting Comparator
Latched Overcurrent Comparator With Full Cycle Restart
Compatible with Voltage-Mode or Current-Mode Control Methods
Practical Operation at Switching Frequencies to 1 MHz
50-ns Propagation Delay to Output
High-Current Dual Totem Pole Outputs (2-A Peak)
Trimmed Oscillator Discharge Current
Low 100-µA Startup Current
Pulse-by-Pulse Current Limiting Comparator
Latched Overcurrent Comparator With Full Cycle Restart
UC3823B Connection Diagram
UC3823B
PDF/DataSheet Download
- Datasheet: UC3823B
- File Size: 310662 KB
- Manufacturer: TI [Texas Instruments]
- Click here to Download
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UC3823A
The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth productis 1...
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