VNH5019A-E Block diagram and pin description
Doc ID 15701 Rev 9 7/37
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6 CS_DIS
Active high CMOS compatible pin to disable the current sense
pin
4IN
A
Clockwise input. CMOS compatible
7 PWM PWM input. CMOS compatible.
8CS
Output of current sense. This output delivers a current
proportional to the motor current, if CS_DIS is low or left open.
The information can be read back as an analog voltage across
an external resistor.
9EN
B
/DIAG
B
Status of high-side and low-side switches B; Open drain output.
This pin must be connected to an external pull up resistor. When
externally pulled low, it disables half-bridge B. In case of fault
detection (thermal shutdown of a high-side FET or excessive
ON-state voltage drop across a low-side FET), this pin is pulled
low by the device (see Table 13: Truth table in fault conditions
(detected on OUTA).
10 IN
B
Counter clockwise input. CMOS compatible
11 CP
Connection to the gate of the external MOS used for the reverse
battery protection
15, 16, 21
OUT
B,
Heat Slug3
Source of high-side switch B / drain of low-side switch B, power
connection to the motor
26, 27, 28 GND
A
Source of low-side switch A and power ground
(1)
18, 19, 20 GND
B
Source of low-side switch B and power ground
(1)
1. GNDA and GNDB must be externally connected together
Table 3. Block descriptions
(1)
Name Description
Logic control
Allows the turn-on and the turn-off of the high-side and the
low-side switches according to the Table 12.
Overvoltage + undervoltage
Shut down the device outside the range [4.5 V to 24 V] for the
battery voltage.
High-side, low-side and clamp
voltage
Protect the high-side and the low-side switches from the
high-voltage on the battery line in all configuration for the motor.
High-side and low-side driver
Drive the gate of the concerned switch to allow a proper R
DS(on)
for the leg of the bridge.
Linear current limiter
Limits the motor current, by reducing the high-side switch
gate-source voltage when short-circuit to ground occurs.
High-side and low-side
overtemperature protection
In case of short-circuit with the increase of the junction’s
temperature, it shuts down the concerned driver to prevent its
degradation and to protect the die.
Low-side overload detector
Detects when low-side current exceeds shutdown current and
latches off the concerned low-side.
Table 2. Pin definitions and functions (continued)
Pin Symbol Function
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