3940
FULL-BRIDGE POWER MOSFET CONTROLLER
鈥?For Automotive Applications
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The A3940KLP and A3940KLW are designed specifically 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 configuration.
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
shutdown, and motor lead short-to-battery and short-to-ground fault
notification, 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
(suffix 鈥揟).
Data Sheet
29319.100i
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A3940KLP
(TSSOP with exposed
thermal pad)
A3940KLW
(SOIC)
Approx. 2X actual size.
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage Range, VBB,
VDRAIN, CP1 ..........
-0.6 V to +40 V
Output Voltage Ranges,
LSS ..............................
-2 V to +6.5 V
GHA/GHB, V
GHX
........
-2 V to +55 V
SA/SB, V
SX
..................
-2 V to +45 V
GLA/GLB, V
GLX
..........
-2 V to +16 V
CA/CB, V
CX
..............
-0.6 V to +55 V
CP2,VCP, VIN ..........
-0.6 V to +52 V
Logic Input/Output Voltage Range
V
IN
, V
OUT
...................
-0.3 V to +6.5 V
Operating Temperature Range,
T
A
...........................
-40擄C to +135擄C
Junction Temperature, T
J
.........
+150擄C*
Storage Temperature Range,
T
S
...........................
-55擄C to +150擄C
* Fault conditions that produce excessive
junction temperature will activate device
thermal shutdown circuitry. These conditions
can be tolerated, but should be avoided.
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 rectification
Fault diagnostic output
Adjustable dead-time cross-conduction protection
Motor lead short-to-battery and short-to-ground protection
Undervoltage/overvoltage protection
-40擄C to +150擄C, T
J
operation
Thermal shutdown
Always order by complete part number
Part Number
A3940KLP-T
A3940KLP
A3940KLW-T
A3940KLW
Pb-free
Yes
鈥?/div>
Yes
鈥?/div>
Package
28-pin TSSOP
28-pin TSSOP
28-pin SOICW
28-pin SOICW
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