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ANALOG DEVICES LT8309IS5#TRPBF
Rectifier Driver, Secondary-Side, Synchronous, Flyback, 4.5 to 40 V, -40 to 125 Deg C, TSOT-23-5
- Manufacturer:
- ANALOG DEVICES ANALOG DEVICES
- Manufacturer Part No:
- LT8309IS5#TRPBF
- Order Code:
- 4029920
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- Technical Datasheet:
- LT8309IS5#TRPBF Datasheet
- ECAD / MCAD
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Product Overview
LT8309 is a secondary-side synchronous rectifier driver that replaces the output rectifier diode in a flyback topology. By replacing the diode with an N-channel MOSFET, applications are no longer restricted by the heat constraints of the output diode. The IC replicates the behaviour of a diode by sensing the drain-to-source voltage to determine when the current becomes negative. The LT8309's low minimum on- and off-times help improve noise immunity. The fast propagation delay of 26ns allows applications to operate in discontinuous conduction mode and critical conduction mode. The gate driver features a 0.8ohm pull-down device for fast turn-offs. The 40V VCC rating allows the part to be driven from the output voltage or the rectified drain voltage of the MOSFET. A low quiescent current of 400µA maximizes efficiency at low output currents. Application includes high output current flybacks, high efficiency flybacks.
- Works with DCM and BCM/CrCM conduction mode flyback topologies
- Input voltage range from 4.5 to 40V (TA = 25°C)
- Supports up to 150V MOSFETs
- Turn-off propagation delay is 26ns (typ, RS = 0 ohm, -100mVOD, VDS to VGATE)
- Accurate minimum on and off timers for reliable operation
- Adjustable and accurate trip point range from +5mV to –30mV
- VCC quiescent current is 300µA (typ, not switching, INTVCC = 8V)
- Drain voltage latch reset is 1.21V (typ, RS = 0 ohm, TA = 25°C)
- Drain current is 10µA (typ, out of pin, TA = 25°C)
- 5-lead plastic TSOT-23 package, temperature range from -40°C to 125°C
Footnotes
ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party
Product Information
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- Secondary Side Synchronous Rectifier Driver
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- 4.5V
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- 40V
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- TSOT-23
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- 5Pins
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- -40°C
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- 125°C
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- -
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- -
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- MSL 1 - Unlimited
Technical Documents (1)
Packaging type
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2,100 deliver in 3-4 business days from our UK warehouse
Due to market conditions delivery times are for general guidance only and may be subject to change at short notice
¥1,080.72
(¥1,188.79 Inc. JCT)
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