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TL594CPWE4 데이터시트(PDF) 1 Page - Texas Instruments

부품명 TL594CPWE4
상세설명  PULSE-WIDTH-MODULATION CONTROL CIRCUIT
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FEATURES
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1IN+
1IN-
FEEDBACK
DTC
CT
RT
GND
C1
2IN+
2IN-
REF
OUTPUT CTRL
VCC
C2
E2
E1
D, N, NS, OR PW PACKAGE
(TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
TL594
PULSE-WIDTH-MODULATION CONTROL CIRCUIT
SLVS052G – APRIL 1988 – REVISED JANUARY 2007
• Complete PWM Power-Control Circuitry
• Uncommitted Outputs for 200-mA Sink or
Source Current
• Output Control Selects Single-Ended or
Push-Pull Operation
• Internal Circuitry Prohibits Double Pulse at
Either Output
• Variable Dead Time Provides Control Over
Total Range
• Internal Regulator Provides a Stable 5-V
Reference Supply Trimmed to 1%
• Circuit Architecture Allows Easy
Synchronization
• Undervoltage Lockout for Low-V
CC Conditions
The TL594 incorporates all the functions required in the construction of a pulse-width-modulation (PWM) control
circuit on a single chip. Designed primarily for power-supply control, this device offers the systems engineer the
flexibility to tailor the power-supply control circuitry to a specific application.
The TL594 contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator,
a pulse-steering control flip-flop, a 5-V regulator with a precision of 1%, an undervoltage lockout control circuit,
and output control circuitry.
The error amplifiers have a common-mode voltage range of –0.3 V to VCC – 2 V. The DTC comparator has a
fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating
RT to the reference output and providing a sawtooth input to CT, or it can be used to drive the common circuitry
in synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. Each
device provides for push-pull or single-ended output operation, with selection by means of the output-control
function. The architecture of these devices prohibits the possibility of either output being pulsed twice during
push-pull operation. The undervoltage lockout control circuit locks the outputs off until the internal circuitry is
operational.
The TL594C is characterized for operation from 0
°C to 70°C. The TL594I is characterized for operation from
–40
°C to 85°C.
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.
Copyright © 1988–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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