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DRV594VFPR Datasheet

  • DRV594VFPR

  • 3−A HIGH−EFFICIENCY PWM POWER DRIVER

  • 249.02KB

  • 22頁

  • TI

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DRV593
DRV594
SLOS401A - SEPTEMBER 2002 REVISED - OCTOBER 2002
鹵3鈭扐
HIGH鈭扙FFICIENCY PWM POWER DRIVER
FEATURES
D
Operation Reduces Output Filter Size and
Cost by 50% Compared to DRV591
DESCRIPTION
The DRV593 and DRV594 are high-efficiency,
high-current power amplifiers ideal for driving a wide
variety of thermoelectric cooler elements in systems
powered from 2.8 V to 5.5 V. The operation of the device
requires only one inductor and capacitor for the output
filter, saving significant printed-circuit board area.
Pulse-width modulation (PWM) operation and low output
stage on-resistance significantly decrease power
dissipation in the amplifier.
The DRV593 and DRV594 are internally protected against
thermal and current overloads. Logic-level fault indicators
signal when the junction temperature has reached
approximately 115擄C to allow for system-level shutdown
before the amplifier鈥檚 internal thermal shutdown circuitry
activates. The fault indicators also signal when an
overcurrent event has occurred. If the overcurrent circuitry
is tripped, the devices automatically reset (see application
information section for more details).
The PWM switching frequency may be set to 500 kHz or
100 kHz depending on system requirements. To eliminate
external components, the gain is fixed at 2.3 V/V for the
DRV593. For the DRV594, the gain is fixed at 14.5 V/V.
V
DD
10
碌F
1
碌F
D
D
D
D
D
D
D
D
D
鹵3-A
Maximum Output Current
Low Supply Voltage Operation: 2.8 V to 5.5 V
High Efficiency Generates Less Heat
Overcurrent and Thermal Protection
Fault Indicators for Overcurrent, Thermal and
Undervoltage Conditions
Two Selectable Switching Frequencies
Internal or External Clock Sync
PWM Scheme Optimized for EMI
9脳9 mm PowerPAD錚?Quad Flatpack Package
APPLICATIONS
D
Thermoelectric Cooler (TEC) Driver
D
Laser Diode Biasing
PWM
PWM
FREQ
PVDD
PVDD
INT/EXT
PVDD
PWM
1
碌F
120 k鈩?/div>
220 pF
1
碌F
10
碌H
PWM
PGND
PGND
PGND
AVDD
ROSC
COSC
AREF
IN+
IN-
AGND (Connect to PowerPAD)
To TEC or Laser
Diode Anode
DC Control
Voltage
1 k鈩?/div>
1 k鈩?/div>
DRV593
DRV594
PGND
PGND
PGND
H/C
10
碌F
FAULT1
FAULT0
Shutdown Control
SHUTDOWN
PVDD
PVDD
PVDD
H/C
H/C
FAULT1
FAULT0
1
碌F
H/C
To TEC or Laser
Diode Cathode
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 is a trademark of Texas Instruments.
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
錚?/div>
2002, Texas Instruments Incorporated

DRV594VFPR 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 電源管理 - 專用

  • -

  • 熱電冷卻器

  • 4mA

  • 2.8 V ~ 5.5 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 32-LQFP 裸露焊盤

  • 32-HLQFP（7x7）

  • Digi-Reel®

  • 296-19949-ND - EVAL MOD FOR DRV594

  • 296-13644-6

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