DRV590_16 Datasheet, PDF (1/18 Pages) Texas Instruments – 1.2-A HIGH-EFFICIENCY PWM POWER DRIVER

DRV590
SLOS365A – AUGUST 2001 – REVISED AUGUST 2002
1.2-A HIGH-EFFICIENCY PWM POWER DRIVER
FEATURES
D 1.22-A DC (82% Duty Cycle) Output Current
(T_J ≤ 89°C)
D 1-A DC (100% Duty Cycle) Output Current
(T_J ≤ 89°C)
D Low Supply Voltage Operation from 2.7 V
to 5.5 V
D High Efficiency Generates Less Heat
D Over-Temperature Protection
D Short-Circuit Protection
D PowerPADt SOIC and 4 × 4 mm MicroStar
Junior Packages
APPLICATIONS
D Thermoelectric Cooler (TEC) Driver
D Laser Diode Biasing
DESCRIPTION
The DRV590 is a high-efficiency power amplifier ideal
for driving a wide variety of thermoelectric cooler
elements in systems powered from 2.7 V to 5.5 V. PWM
operation and low output stage on-resistance
significantly decrease power dissipation in the amplifier.
The DRV590 is internally protected against over
temperature conditions and current overloads due to
short circuits. The over temperature protection
activates at a junction temperature of 190°C and will
deactivate once the temperature is less than 130°C. If
the overcurrent circuitry is tripped, the amplifier will
automatically reset after 3–5 ms.
The gain of the DRV590 is controlled by two input
terminals, GAIN1 and GAIN0. The amplifier may be
configured for a gain of 6, 12, 18, and 23.5 dB.
J1
R3
120 kΩ
J8
VDD
R4
120 kΩ
J2
J5
J4
IN– (VCOM) IN+
R1
1 kΩ
R2
1 kΩ
R5
120 kΩ
J3
C3
1 µF
NC
IN+
IN–
SHUTDOWN
GAIN0
GAIN1
PVDD
OUT+
NC
PGND
NC
AREF
AGND
COSC
ROSC
VDD
PVDD
OUT–
NC
PGND
L1
10 µH
C5
10 µF
L2
10 µH
C4
1 µF
C9
220 pF
R6
120 kΩ
C1
1 µF
C2
1 µF
C8
10 µF
J8
VDD
J9
GND
J7
OUT+
C6
10 µF
C7
10 µF
J6
OUT–
Typical Circuit Schematic for Driving a Thermoelectric Cooler Element
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.
PowerPAD and MicroStar Junior are trademarks of Texas Instruments.
This document contains information on products in more than one phase
of development. The status of each device is indicated on the page(s)
specifying its electrical characteristics.
Copyright  2002, Texas Instruments Incorporated
www.ti.com
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