Catalog(1 parts)
| Part | Synchronous Rectifier▲▼ | Output Type | Frequency - Switching▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Voltage - Supply (Vcc/Vdd)▲▼ | Number of Outputs▲▼ | Duty Cycle (Max)▲▼ | Output Configuration | Supplier Device Package▲▼ | Supplier Device Package | Supplier Device Package▲▼ | Clock Sync▲▼ | Control Features | Mounting Type | Function | Operating Temperature▲▼ | Operating Temperature▲▼ | Topology | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments 5962-9453001M2ABoost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull Regulator Positive Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 20-LCCC (8.89x8.89) | Transistor Driver | 200000 Hz | 40 V | 8 V | 2 ul | 0.5 ul | Positive | 8.890000343322754 ul | 20-LCCC | 8.890000343322754 ul | Current Limit, Enable, Frequency Control, Soft Start, Sync | Surface Mount | Step-Up, Step-Up/Step-Down | -55 °C | 125 °C | Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull | 20-CLCC |
Key Features
• Pin-for-Pin Compatible With the UC384665ns Typical Delay From Shutdown to Outputs, and 50ns Typical Delay From Sync to OutputsImproved Current Sense Amplifier With Reduced Noise SensitivityDifferential Current Sense with 3V Common Mode RangeTrimmed Oscillator Discharge Current for Accurate Deadband ControlAccurate 1V Shutdown ThresholdHigh Current Dual Totem Pole Outputs (1.5A peak)TTL Compatible Oscillator SYNC Pin Thresholds4kV ESD ProtectionPin-for-Pin Compatible With the UC384665ns Typical Delay From Shutdown to Outputs, and 50ns Typical Delay From Sync to OutputsImproved Current Sense Amplifier With Reduced Noise SensitivityDifferential Current Sense with 3V Common Mode RangeTrimmed Oscillator Discharge Current for Accurate Deadband ControlAccurate 1V Shutdown ThresholdHigh Current Dual Totem Pole Outputs (1.5A peak)TTL Compatible Oscillator SYNC Pin Thresholds4kV ESD Protection
Description
AI
The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.
A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.
Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.
Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1V, 5% shutdown threshold; and 4kV minimum ESD protection on all pins.
The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.
A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.
Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.
Other features include a trimmed oscillator current (8%) for accurate frequency and dead time control; a 1V, 5% shutdown threshold; and 4kV minimum ESD protection on all pins.