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TPS5100 Datasheet

  • TPS5100

  • TRIPLE-CHANNEL PWM CONTROL CIRCUITS

  • 167.51KB

  • 11頁(yè)

  • TI

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TPS5100
TRIPLE-CHANNEL PWM CONTROL CIRCUITS
SLVS169 鈥?JANUARY 2000
D
D
D
D
D
D
D
D
D
D
Low Voltage Operation . . . 2.5 V to 7 V
Low Power . . . 3. 5 mA
(f = 500 kHz, Duty = 50%)
Internal Undervoltage Lockout Protection
Internal Short Circuit Protection
Wide Operating Frequency . . . 50 kHz to
1 MHz
Internal Precision Reference . . . 1.25 V
鹵1%
(25擄C)
On/Off Switch for CH1/3 Pair and Ch2 (see
Function Table)
0 to 100% Dead Time Control
Totem Pole Output Stage
Smal l Package . . . 16 Pin TSSOP
PW PACKAGE
(TOP VIEW)
IN-2
E/O2
V
CC
OUT2
OUT3
OUT1
GND
SCP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
E/O3
IN-3
IN-1
E/O1
C
T
/R
T
DTC2
DTC1/3
V
REF
description
The TPS5100 is a triple PWM control circuit, primarily designed to compose the power supply for LCD display.
Each PWM channel has own error amplifier, PWM comparator, dead-time control and output driver. The
trimmed voltage reference, oscillator, undervoltage lockout and short circuit protection are common for all
channels.
This device includes two boost exclusive circuits (ch1,3) and a buck-boost exclusive circuit (ch2). The operating
frequency is set with external resister and capacitor, and dead time is continuously adjustable form 0% to 100%
duty cycle with resistive divider network. Soft start function can be implemented by adding a capacitor to dead
time divider network. Two dead time control inputs are assigned for ch1,3 pair and ch2 individually and each
dead time control input can be used to control on/off operation. TPS5100 can operate from 2.5 V supply voltage
and ch1,3 pair and ch2 operate with reverse phase switching each other to achieve efficient operation in low
power and battery powered system.
The TPS5100 is characterized for operation from 鈥?0擄C to 85擄C.
FUNCTION TABLE
CONDITION
DTC1/3 >. 0.3 V, DTC2 > 0.3 V
DTC1/3 > 0.3 V, DTC2 <. 0.2 V
DTC1/3 < 0.2 V, DTC2 > 0.3 V
DTC1/3 < 0.2 V, DTC2 < 0.2 V
OUTPUT
CH-1
ON H
ON H
OFF L
OFF L
CH-2
ON L
OFF H
ON L
OFF H
CH-3
ON H
ON H
OFF L
OFF L
AVAILABLE OPTIONS
PACKAGE
TA
鈥?20擄C to 85擄C
TSSOP
(PW)
TPS5100PW
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
漏
2000, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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