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Part Number: TD3845A
Description: The TD3842A/ 3843A/3844A/3845A are fixed frequency current-mode PWM controller. They are specially des...
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TD3845A
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DataSheet
General Description
TD3845A General Description
The TD3842A/ 3843A/3844A/3845A are fixed frequency current-mode PWM controller. They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components.
These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier. current sensing comparator, and a high current totempole output Ideally suited for driving a power MOSFET. Protection circuity Includes built under-voltage lockout and current limiting. The TD3842A and TD3844A have UVLO thresholds of 16V (on) and 10V (off) The TD 3843A and TD3845A are 8.4V (on) and 7.6V (off) The TD3842A and TD3843A can operate within 100% duty cycle.The TD3844A and TD3845A can operate with 50% duty cycle.
TD3845A Maximum Ratings
| R ating | S ymbol | Value | Unit |
| Bias and Driver Voltages (Zero S eries Impedance, see also Total Device spec) | VCC, VC | 30 | V |
| Total Power S upply and Zener Current | (ICC + IZ) | 30 | mA |
| Output Current, S ource or S ink (Note 1) | IO | 1.0 | A |
| Output E nergy (Capacitive Load per Cycle) | W | 5.0 | mJ |
| Current S ense and Voltage Feedback Inputs | Vin | - 0.3 to + 5.5 | V |
| E rror Amp Output S ink Current | IO | 10 | mA |
| Power Dis s ipation and Thermal Characteris tics Dis s ipation @ TA = 25°C Maximum Power Thermal R es is tance, Junction-to-Air N S uffix, P las tic P ackage Maximum Power Dis s ipation @ TA = 25°C Thermal R es is tance, Junction-to-Air |
PD R QJA PD R QJA |
862 145 1.25 100 |
mW °C/W W °C/W |
| Operating Junction Temperature | TJ | + 150 | °C |
| Operating Ambient Temperature | TA | 0 to + 70 | °C |
| S torage Temperature R ange | Ts tg | - 65 to + 150 | °C |
1. Maximum P ackage power dis s ipation limits mus t be observed.
TD3845A Features
• Low Start Up Current
• Maximum Duty Clamp
• UVLO With Hysteresis
• Operating Frequency Up To 500KHz
• Maximum Duty Clamp
• UVLO With Hysteresis
• Operating Frequency Up To 500KHz
TD3845A Connection Diagram
TD3.3M10
PDF/DataSheet Download
- Datasheet: TD3.3M10
- File Size: 25162 KB
- Manufacturer: NTE Electronics
- Click here to Download
- ·TD3.3M16
- NTE Electronics
- SOLID TANTALUM
- 25162 KB
- ·TD3.3M20
- NTE Electronics
- SOLID TANTALUM
- 25162 KB
- ·TD3.3M25
- NTE Electronics
- SOLID TANTALUM
- 25162 KB
- ·TD3.3M35
- NTE Electronics
- SOLID TANTALUM
- 25162 KB
- ·TD3.3M50
- NTE Electronics
- SOLID TANTALUM
- 25162 KB
- ·TD3.3M6.3
- NTE Electronics
- SOLID TANTALUM
- 25162 KB
- ·TD300
- STMICROELECTRONICS [STMicroelectronics]
- 15V TRIPLE IGBT/MOS DRIVER
- 138658 KB
- ·TD300D
- STMICROELECTRONICS [STMicroelectronics]
- 15V TRIPLE IGBT/MOS DRIVER
- 138658 KB
TD3845A Relative Products
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The TD3844A are fixed frequency current-mode PWM controller. They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components.These integrated circuits feature a trimmed oscillator for precise duty cycle control...
TD3843A
The TD3843A are fixed frequency current-mode PWM controller. They are specially designed for Off - Line and DC-to-DC converter applications with minimum external components.These integrated circuits feature a trimmed oscillator for precise duty cycle control...
TD3842A
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