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MOSFET Controller. 3940 Datasheet

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MOSFET Controller. 3940 Datasheet






3940 Controller. Datasheet pdf. Equivalent




3940 Controller. Datasheet pdf. Equivalent





Part

3940

Description

Full-Bridge Power MOSFET Controller



Feature


3940 3940 ADVANCED DATASHEET – 4/9/03 (Subject to change without notice.) H- BRIDGE POWER MOSFET CONTROLLER The A394 0 was designed specifically for driving high power DC motors in automotive app lications. The A3940 provides four high current gate drive outputs capable of driving a wide range of power N-channel MOSFETs. Bootstrap capacitors are util ized to provide the .
Manufacture

Allegro Micro Systems

Datasheet
Download 3940 Datasheet


Allegro Micro Systems 3940

3940; above battery supply voltage required fo r N-channel FETs. An internal charge pu mp for the highside will allow for DC ( 100% duty cycle) operation of the bridg e. PHASE and ENABLE input terminals are provided for use in controlling the sp eed and direction of a DC motor with ex ternally applied PWM control signals. P rotection features include supply under -voltage and over-.


Allegro Micro Systems 3940

voltage, programmable deadtime adjustmen t for cross-conduction protection, ther mal shutdown, and motor lead short-to-s upply and short-to-ground protection. T he A3940 is available in 28L low profil e (1mm) e-TSSOP packaging (LP) which ha s an exposed pad solderable to PCB laye rs for improved thermal and electrical performance. Also, it is available in t he widebody, SOIC .


Allegro Micro Systems 3940

(LW) package. www.DataSheet4U.com VDRAI N 1 LSS 2 GLB 3 SB 4 GHB 5 CB 6 VIN 7 V REG13 8 CA 9 GHA 10 SA 11 GLA 12 VBB 13 CP2 14 28 VDSTH 27 IDEAD 26 LONG 25 R ESET 24 PHASE 23 ENABLE A3940LP, LW 2 2 SR 21 MODE 20 VREG5 19 OVSET 18 FAULT 17 GND 16 CP1 15 VCP ABSOLUTE MAXIMUM RATINGS Load Supply Voltages VBB, Vdra in, CP1 . -0.6 V to +40 V Logic Input/O utput Voltage Rang.

Part

3940

Description

Full-Bridge Power MOSFET Controller



Feature


3940 3940 ADVANCED DATASHEET – 4/9/03 (Subject to change without notice.) H- BRIDGE POWER MOSFET CONTROLLER The A394 0 was designed specifically for driving high power DC motors in automotive app lications. The A3940 provides four high current gate drive outputs capable of driving a wide range of power N-channel MOSFETs. Bootstrap capacitors are util ized to provide the .
Manufacture

Allegro Micro Systems

Datasheet
Download 3940 Datasheet




 3940
3940
A3940KLP
(TSSOP with exposed
thermal pad)
A3940KLW
(SOIC)
Approx. 2X actual size.
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage Range, VBB, VD-
RAIN, CP1 ........................ -0.6 V to +40 V
Output Voltage Ranges,
LSS .............................. -2 V to +6.5 V
GHA/GHB, VGHX ......... -2 V to +55 V
SA/SB, VSX .................. -2 V to +45 V
GLA/GLB, VGLX .......... -2 V to +16 V
CA/CB, VCX .............. -0.6 V to +55 V
CP2,VCP, VIN ........... -0.6 V to +52 V
Logic Input/Output Voltage Range
VIN, VOUT .................... -0.3 V to +6.5 V
Operating Temperature Range,
TA ............................ -40°C to +135°C
Junction Temperature, TJ .......... +150°C*
Storage Temperature Range,
TS ............................ -55°C to +150°C
* Fault conditions that produce excessive junc-
tion temperature will activate device thermal
shutdown circuitry. These conditions can be
tolerated, but should be avoided.
The A3940KLP and A3940KLW are designed specically for
automotive applications that require high-power motors. Each provides
four high-current gate drive outputs capable of driving a wide range of
n-channel power MOSFETs in a full-bridge conguration.
Bootstrap capacitors are utilized to provide the above-battery supply
voltage required for n-channel FETs. An internal charge pump for the
high side allows for dc (100% duty cycle) operation of the bridge.
Protection features include supply under/overvoltage, thermal shut-
down, and motor lead short-to-battery and short-to-ground fault noti-
cation, and a programmable dead-time adjustment for cross-conduction
prevention. The overvoltage trip point is user adjustable.
The A3940 is supplied in a choice of two power packages, a 28-pin
TSSOP with an exposed thermal pad (package type LP), and a 28-pin
wide-body SOIC (package type LW). Both package types are available
in lead (Pb) free versions, with 100 % matte-tin leadframe plating (suf-
x –T).
FEATURES
Drives wide range of n-channel MOSFETs
Charge pump to boost gate drive at low-battery-input conditions
Bootstrapped gate drive with charge pump for 100% duty cycle
Synchronous rectication
Fault diagnostic output
Adjustable dead-time cross-conduction protection
Motor lead short-to-battery and short-to-ground protection
Undervoltage/overvoltage protection
-40°C to +150°C, TJ operation
Thermal shutdown
Always order by complete part number
Part Number Pb-free
A3940KLPTR-T Yes
A3940KLPTR
Status Package
NND 28-pin TSSOP
LTB 28-pin TSSOP
Packing
4000 pcs/reel
4000 pcs/reel




 3940
3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
Functional Block Diagram
See pages 7 and 8 for terminal assignments and descriptions.
115 Northeast Cutoff, Box 15036
2 Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2003 Allegro MicroSystems, Inc.




 3940
A3940KLP (TSSOP)
3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
A3940KLW (SOIC)
* Measured on “High-K” multi-layer PWB per JEDEC Standard JESD51-7.
† Measured on typical two-sided PWB .
www.allegromicro.com
The products described here are manufactured under one or more
U.S. patents or U.S. patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the performance, reliability, or
manufacturability of its products. Before placing an order, the user is
cautioned to verify that the information being relied upon is current.
Allegro products are not authorized for use as critical components
in life-support devices or systems without express written approval.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsi-
bility for its use; nor for any infringement of patents or other rights of
third parties which may result from its use.
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