In the pulse width modulator UCC35701/UCC35702 home is used to isolate the switching power supply using the primary side control supply. They can be used in both offline applications and DC/DC converter designs, such as in distributed power system architectures, or as telecom power supplies.
These devices have low start-up current, high efficiency off-site starting line allows, but there is enough output driver in the 500kHz switching power MOSFET surplus.
Voltage feedforward compensation, operates over the 5:1 input range, and provides a fast, accurate response to input voltage changes over the 4:1 range. Accurate volt-second pliers and maximum duty cycle limits are also on display.
Fault protection provides pulse current limiting of pulses and the ability to latch programmable numbers after a fault occurs.
characteristic
- 700kHz operation
- Integrated oscillator/voltage feedforward compensation
- Precise duty cycle limits
- Accurate volt-second clamping
- Optocoupler interface
- Count shutdown failures
- Fault locking or automatic shutdown
- Soft-stop synchronous rectification optimization
- 1A peak gate drive output
- 130μA start-up current
- 750μA operating current
parameter
| |
UCC25701 |
|
| topology |
Boost, reverse, forward |
|
| Control method |
Voltage mode |
|
| Duty Cycle (Max) (%) |
99 |
|
| Frequency (max) (kHz) |
700 |
|
| On/off of undervoltage lockout threshold (5) |
13 / 9 |
|
| Pin/Pack |
14PDIP，14SOIC，14TSSOP |
|
| (#) Regulated output |
One |
|
| Operating Temperature Range (°C) |
-40 to 85 |
|