A3940KLW

Series: -
Type: -
On-State Resistance: -
Current - Output / Channel: -
Current - Peak Output: -
High Side Voltage - Max (Bootstrap): -
Mounting Type: Surface Mount
Packaging: Tube
Number of Configurations: 1
Input Type: Non-Inverting
Number of Outputs: 4
Manufacturer: Allegro Microsystems Inc
Configuration: H Bridge
Package / Case: 28-SOIC (0.295", 7.50mm Width)
Supplier Device Package: 28-SOIC W
Delay Time: 225ns
Current - Peak: 700mA
Voltage - Supply: 7 V ~ 40 V
Operating Temperature: -40°C ~ 135°C


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°C to +150°C, T_J operation
·Thermal shutdown


Pinout




Specifications

Load Supply Voltage Range, V_BB,
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,V_CP, V_IN ............. -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°C to +135°C
Junction Temperature, T_J .... +150°C*
Storage Temperature Range,
T_S ........................ -55°C to +150°C
* Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated, but should be avoided.


Description

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 crossconduction 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 T).

Parameters:

Technical/Catalog Information	A3940KLW
Vendor	Allegro Microsystems Inc
Category	Integrated Circuits (ICs)
Configuration	H Bridge
Voltage - Supply	7 V ~ 40 V
Current - Peak	700mA
Delay Time	225ns
Package / Case	28-SOIC (7.5mm Width)
Packaging	Tube
Number of Outputs	4
Input Type	Non-Inverting
Number of Configurations	1
Operating Temperature	-40°C ~ 135°C
High Side Voltage - Max (Bootstrap)	-
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	A3940KLW A3940KLW