3940 Datasheet PDF - Allegro Micro Systems
| Part Number | 3940 | |
| Description | H-bridge Power MOSFET Controller | |
| Manufacturers | Allegro Micro Systems | |
| Logo |  |
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39430940
ADVANCED DATASHEET – 4/9/03
(Subject to change without notice.)
H-BRIDGE POWER
MOSFET CONTROLLER
VDRAIN 1
28 VDSTH
LSS 2
27 IDEAD
GLB 3
26 LONG
SB 4
25 RESET
GHB 5
24 PHASE
CB 6
VIN 7
VREG13 8
23 ENABLE
A3940LP, LW 22 SR
21 MODE
CA 9
20 VREG5
GHA 10
19 OVSET
SA 11
18 FAULT
GLA 12
17 GND
VBB 13
16 CP1
CP2 14
15 VCP
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltages
VBB, Vdrain, CP1 …………. -0.6 V to +40 V
Logic Input/Output Voltage Range,
Vin/out ……………. -0.3 V to +6.5 V
LSS Voltage................................ -2 V to + 6.5 V
Pins SA/SB .................................... -2 V to +45 V
Pins GHA/GHB ................................ -2 to + 55 V
Pins CA/CB………….………….…-0.6 to + 55 V
Pins CP2/VCP/VIN ..……………–0.6 to + 52 V
Operating Temperature Range,
TA ............................ -40 °C to +135 °C
Max. Junction Temperature, TJ ............... +150 °C
Storage Temperature Range,
TS............................. -55 °C to +150 °C
------------------------------------------------------------
THERMAL IMPEDANCE, typical (Ta = +25 °C)*
A3940LP, θ JA ……………………. 28 °C/W
A3940LW, θ JA …………………… 44 °C/W
* Measured with JEDEC standard “High K” 4 layer
board.
The A3940 was designed specifically for driving high power DC
motors in automotive applications. The A3940 provides four high current gate
drive outputs capable of driving a wide range of power N-channel MOSFETs.
Bootstrap capacitors are utilized to provide the above battery supply
voltage required for N-channel FETs. An internal charge pump for the high-
side will allow for DC (100% duty cycle) operation of the bridge.
PHASE and ENABLE input terminals are provided for use in
controlling the speed and direction of a DC motor with externally applied
PWM control signals.
Protection features include supply under-voltage and over-voltage,
programmable deadtime adjustment for cross-conduction protection, thermal
shutdown, and motor lead short-to-supply and short-to-ground protection.
The A3940 is available in 28L low profile (1mm) e-TSSOP
packaging (LP) which has an exposed pad solderable to PCB layers for
improved thermal and electrical performance. Also, it is available in the wide-
body, SOIC (LW) package.
www.DataSheet4U.com
FEATURES
High Current Gate Drive for Driving
a Wide Range of N-ch MOSFET’s
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-Ground
and Short-to- Supply
Protection.
Thermal Shutdown
Gate Drive for External
Reverse Battery MOSFET
Under-voltage Protection
Over-voltage Protection
-40 °C to 150 °C, Tj Operation
|
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H-BRIDGE POWER MOSFET CONTROLLER
Characteristics
Bootstrap Circuit
Diode Forward Current Limits
Diode Forward Drop
Diode Resistance
Top-off CP Source Current at Cx
Fault/Protection Circuits
VBB Under-voltage
VBB UV Hysteresis
VREG13 Under-voltage
VREG13 Hysteresis
VBB Over-voltage
VBB OV Hysteresis
OVSET Input Current
Short-to-Ground Threshold
Short-to-Battery Threshold
Vdrain/Open-Bridge Threshold
VDSTH Input Current
Vdrain/Open-Bridge Current
Fault Latch Clear Pulsewidth
Fault Clear Prop Delay
Fault Detection Noise Filter
Fault Output
Thermal Shutdown Temp.
Thermal Shutdown Hysteresis
Symbol Test Conditions
Min. Typ. Max. Units
Icx 3V <[ (VREG13 = 13.5V) - Vcx] < 12V
Vd Id = 10 mA
Rd Rd(100) = [Vd(150) - Vd(50)] / 100
Icx Vcx-Vsx=8V, Vbb=40V, GHx=1(no load)
140
0.8
1.5
50
1000
2.0
6.5
mA
V
Ω
uA
Vbbuv
VBB decreasing
Vbbuvhy Recovery = Vbbuv + Vbbuvhy
V13uv Vin decreasing
V13uvhy Recovery = V13uv + V13uvhy
Vbbov
Vbb increasing, Vovset = 0 V
Vbb increasing, Vovset = 0.45 V
Vbb increasing, Vovset = 0.9 V
Vbbovhy Recovery = Vbbov - Vbbovhy
Iovset Vovset = 0 to 0.9 V
Vstg
0.5 < Vdsth < 3.0 V
Vstb
0.5 < Vdsth < 3.0 V
Vdoth
Idsth
Ivdrain
Tlatch
Tprop
If Vdrain < Vdoth a Bridge fault occurs
1.0V < Vdsth < 3.0 V
RESET = 0
RESET = 1, Vdsth < 3.0 V
RESET= 0, pulse
From RESET=1 to FAULT=0
Tnoise
Vout(0)
Iout(1)
TJTSD
∆TJ
Iout = 5 mA, faults negated.
Vout = 5V, open-drain, fault asserted.
Temperature increasing.
Recovery = TJTSD - ∆TJ
4.5
200
7.5
200
16
24
32.5
2.1
Vdsth –
0.4
Vdsth –
0.4
1
0.15
5.25 6.0
450 700
8.25 9.0
450 700
19.6 22
28 30.5
36.4 39
3.1 4.1
1.4
Vdsth +
0.3
Vdsth +
0.3
3
1
1
0.5
2.0
2.0
1.7
0.4
1
172
12
V
mV
V
mV
V
V
V
V
uA
V
V
V
uA
uA
mA
uS
uS
uS
V
uA
°C
°C
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 3940 electronic component. |
| Information | Total 9 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ 3940.PDF Datasheet ] | |
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