TEA1791T
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?NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 02 7 June 2010
7 of 12
NXP Semiconductors
TEA1791T
GreenChip synchronous rectifier controller
11. Application information
A switched mode power supply with the TEA1791T consists of a primary side
discontinuous conduction mode flyback controller, a transformer, and an output stage with
a feedback circuit. A MOSFET (Q
sec
) is used for low conduction losses in the output state.
This MOSFET is controlled by the TEA1791T.
The timing for the synchronous rectifier switch is derived from the voltage sensed on the
SRSENSE pin. The resistor in the SRSENSE connection is needed to protect the
TEA1791T from excessive voltages. The R
SRSENSE
resistor should typically be 1 k?
Higher values might impair correct timing, lower values may not provide sufficient
protection.
Fig 4. Application diagram high side rectification
Fig 5. Application diagram low side rectification
V
in
TR
PRIMARY
SIDE
CONTROLLER
Q
prim
V
CC
GND DRIVER
TEA1791T
SRSENSE
Q
sec
R
SRSENSE
V
out
C
out
014aaa702
DRIVER
SRSENSE
V
CC
V
out
GND
TEA1791T
PRIMARY
SIDE
CONTROLLER
V
in
Q
sec
C
out
R
SRSENSE
Q
prim
TR
014aaa84
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TEA1792ATS
制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:GreenChip synchronous rectifier controller
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制造商:NXP Semiconductors 功能描述:Synchronous Rectifier Controller 6-Pin TSOP T/R 制造商:NXP Semiconductors 功能描述:TEA1792ATS/SC-74/REEL7//1 - Tape and Reel 制造商:NXP Semiconductors 功能描述:IC SYNC RECT CONTROLLER 6TSOP
TEA1792N1
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功能描述:DC/DC 开关控制器 20V 0.45W 10%
RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
TEA1792TS/1
制造商:NXP Semiconductors 功能描述:CNTRL RECTIFICATION 38V 2.7A 6TSOP 制造商:NXP Semiconductors 功能描述:CNTRL, RECTIFICATION, 38V, 2.7A, 6TSOP 制造商:NXP Semiconductors 功能描述:CNTRL, RECTIFICATION, 38V, 2.7A, 6TSOP; Input Voltage:20V; Output Voltage:10V; Supply Voltage Min:8.6V; Supply Voltage Max:38V; Voltage Regulator Case Style:TSOP; No. of Pins:6; No. of Outputs:1; Operating Temperature Min:-40C; ;RoHS Compliant: Yes
TEA1792TS/1,115
功能描述:DC/DC 开关控制器 20V 0.27W 10%
RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK
TEA1795T/N1
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