A3940KLPTR-T Datasheet, PDF (7/13 Pages) Allegro MicroSystems – Full-Bridge Power MOSFET Controller

3940
FULL-BRIDGE POWER
MOSFET CONTROLLER
ELECTRICAL CHARACTERISTICS: unless otherwise noted at T_A = -40°C to +135°C, T_J = -40°C to +150°C,
V_IN ≤ V_BB = 7 V to 40 V, C_p = 0.47 µF, C_r = 1 µF, C_REG5 = 0.1 µF, C_REG13 = 10 µF, C_BOOT = 0.1 µF, PWM = 22.5 kHz
square wave.
Limits
Characteristics
Symbol Conditions
Min Typ Max Units
Bootstrap Circuit
Diode Forward Current Limit
Diode Forward Drop
Diode Resistance
Top-off CP Source Current at Cx
Fault Logic
VBB Undervoltage
VBB Undervoltage Hysteresis
VREG13 Undervoltage
VREG13 Undervoltage Hyst.
VBB Overvoltage
I_CX
V_F
R_F
Icx
V_BB(uv)
∆V_BB(uv)
V_REG13(uv)
∆V_REG13(uv)
V_BB(ov)
VBB Overvoltage Hysteresis
OVSET Input Current
VDSTH Input Current
Short-to-Ground Threshold
∆V_BB(ov)
I_SET(ov)
I_DSTH
V_STG(th)
Short-to-Battery Threshold
V_STB(th)
V_DRAIN /Open Bridge Threshold
V_DRAIN /Open Bridge Current
V_DO(th)
I_VDRAIN
Fault Latch Clear Pulsewidth
Fault Clear Propagation Delay
Fault Detection Noise Filter
Fault Output
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
t_latch
t_pd
t_noise
V_out(0)
I_out(1)
T_J
∆T_J
3 V < [(V_REG13 = 13.5 V) - V_CX] < 12 V
I_F = 10 mA
R_F(100) = [V_F(150) - V_F(50)]/100
V_CX - V_SX = 8 V, V_BB = 40 V, GHx = 1(no load)
140
– 1000 mA
0.8
–
2.0
V
1.5
–
6.5
Ω
40
–
–
µA
Decreasing V_BB
4.5 5.25 6.0
V
V_BB(recovery) - V_BB(uv)
200 450 700 mV
Decreasing V_IN
7.5 8.25 9.0
V
V_{REG13(recovery)} - V_REG13(uv)
200 450 700 mV
Increasing V_BB, FAULT = 0 to 1, V_OVSET = 0 V
16 19.6 22
V
Increasing V_BB, FAULT = 0 to 1, V_OVSET = 0.45 V
24
28 30.5
V
Increasing V_BB, FAULT = 0 to 1, V_OVSET = 0.9 V
32.5 36.4 39
V
V_BB(ov) - V_BB(recovery)
2.1 3.1 4.1
V
0 V < V_SET(ov) < 0.9 V
–
–
1.4
µA
0.3 V < V_DSTH < 3 V
–
–
1.0
µA
V_DSTH = 0.3 V
V_DSTH-0.14 – V_DSTH+0.10 V
V_DSTH = 1.0 V
V_DSTH-0.18 – V_DSTH+0.13 V
V_DSTH = 3.0 V
V_DSTH-0.39 – V_DSTH+0.26 V
V_DSTH = 0.3 V
V_DSTH-0.20 – V_DSTH+0.30 V
V_DSTH = 1.0 V
V_DSTH-0.24 – V_DSTH+0.30 V
V_DSTH = 3.0 V
V_DSTH-0.37 – V_DSTH+0.30 V
If V_DRAIN < V_DO(th), FAULT = 0 to 1
1.0
–
3.0
V
RESET = 0
–
–
1.0
µA
RESET = 1, V_DSTH < 3 V
RESET = 0, pulse
–
–
500
µA
0.15 –
2.0
µs
From RESET = 1 to FAULT = 0
–
2.0
–
µs
–
1.7
–
µs
I_out = 5 mA, faults negated
V_out = 5 V, open-drain, fault asserted
T_J increasing
T_J decreasing
–
–
0.4
V
–
–
1.0
µA
–
172
–
°C
–
12
–
°C
NOTES: Typical Data is for design information only.
Negative current is defined as coming out of (sourcing) the specified device terminal.
115 Northeast Cutoff, Box 15036
6
Worcester, Massachusetts 01615-0036 [phone]