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TL14661

更新时间： 2024-11-17 22:42:11
品牌 Logo 应用领域
德州仪器 - TI 开关控制器
页数 文件大小 规格书
22页 328K
描述
HIGH SPEED / PRECISION SIX CHANNEL SWITCHING REGULATOR CONTROLLER

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中文翻译

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TL14661 数据手册

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SLVS262 − FEBRUARY 2000  
D
D
High-Speed Output Circuit to Drive PNP  
Power Transistor  
D
D
D
D
D
D
Output Voltage Limit (Channel 5 and 6)  
Low Supply Current  
Precision Reference Voltage . . . 1.5 V 2%  
Internal Undervoltage Lockout Protection  
Internal Short-Circuit Protection  
Shutdown Function  
at T = 25°C  
A
D
Oscillator Frequency . . . 50 kHz to 0.8 MHz  
D
Low Supply Voltage Operation V  
to 12 V  
= 2.5 V  
CC  
External Sink Current Setting on Output  
Stage  
description  
The TL1466I is a six channel pulse-width-modulation (PWM) control circuit. This device contains reference  
voltage with a precision of 2%, a triangle wave oscillator capable of high frequency oscillation up to 0.8 MHz,  
various protection circuitry, and shutdown circuitry. The output regulation voltage for each channel is set by an  
external resistor divider. Moreover, the output stage is capable of driving a PNP power transistor with high  
speed. The high frequency/efficiency switching operation eliminates switching loss by using internal over-drive  
circuitry at the rising edge and with reverse bias connecting external bootstrap capacitor at the falling edge. The  
MOSFET can be used in parallel with the output diode at channel 1 and 4. This results in further high efficiency  
operation replacing the constant time with this MOSFET when the output diode is turned on. Furthermore, it  
operates 2.5 V supply voltage and balances switching current by switching repeatedly at the reverse phase with  
two pairs (channel 1, 4, 6, and 2, 3, 5) of the six channels. The oscillator output of channel 1, 4, and 6 is reverse  
phase for channel 2, 3, and 5. As a result of these features, this device is well-suited for power supply of portable  
systems in battery-powered equipment.  
FUNCTION TABLE FOR STANDBY  
INPUT  
STANDBY STANDBY-3  
V ≤ 0.4 V  
OUTPUT  
VREF  
OFF  
ON  
OUTPUT1, 2, 4, 5, 6 OUTPUT3  
†
X
OFF  
ON  
OFF  
ON  
I
V ≥ 2 V  
I
V ≥ 2 V  
I
V ≤ 0.4 V  
ON  
ON  
OFF  
I
†
X: High-level or low-level  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
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Copyright 2000, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...22

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