PD7401B
- Optimized for Off-Line and dc-to-dc Converters
- Integrated Green Current Mode PWM Control
- Low Operating Current: Max 8Ma
- Burst Mode Operation
- Internal High Voltage Start-up Switch
- Under Voltage Lockout (UVLO): 12V/8V
- Latch Protection & Soft Start Function
- Over Voltage Protection: 19V
- Operating Frequency up to 300kHz
- Max Duty Cycle: 95%
PD7401B
IC
Features
- Optimized for Off-Line and dc-to-dc Converters
- Integrated Green Current Mode PWM Control
- Low Operating Current: Max 8Ma
- Burst Mode Operation
- Internal High Voltage Start-up Switch
- Under Voltage Lockout (UVLO): 12V/8V
- Latch Protection & Soft Start Function
- Over Voltage Protection: 19V
- Operating Frequency up to 300kHz
- Max Duty Cycle: 95%
Description
The PD7401B, Integrated a green programmable frequency current mode PWM controller. It is specially designed for the Poe pd application and off-line adapter application and the auxiliary power supplies which require high efficiency at a light load and no load.
The internal high voltage start-up switch and the burst mode reduce the power loss. The PD7401B includes some protections such as latch protection and over voltage protection. The latch protection can be used for over voltage protection and/or thermal protection and so on. And the soft start prevents the output voltage over shoot at start up.
Typical Applications
• Off-Line Adapter Applications
• Auxiliary Power Supplies
• POE PD Applications
Absolute Maximum Ratings
| (Ta = 25°C, unless otherwise specified) | |||
| Characteristics | Symbol | Value | Unit |
| Supply Voltage | VCC | 20 | V |
| Input Voltage CS/FB | VCS/FB | -0.3 to 20 | V |
| Operating Temperature | TOPR | -40 to +125 | °C |
| Storage Temperature | TSTG | -55 to +150 | °C |
| Junction Temperature | Tj | 150 | °C |
| Output Current | IO | 250 | mA |
| Vstr Input Voltage | Vstr | 500 | V |
| ESD Capability, HBM Model | - | 2 | kV |
| (All pins except Vcc and Vstr) |