BTM7752G Infineon Technologies, BTM7752G Datasheet - Page 17

• Manufacturer Part Number: BTM7752G
• Description: Motor / Motion / Ignition Controllers & Drivers Hi Current H-Bridge Trilith IC 3G
• Manufacturer: Infineon Technologies
• Type: H-Bridge Motor Driverr

Specifications of BTM7752G

• Product: Electronic Ignition Drivers
• Operating Supply Voltage: 45 V
• Supply Current: 5 mA
• Mounting Style: SMD/SMT
• Package / Case: PG-DSO-36
• Supply Voltage (min): - 0.3 V
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: BTM7752GXT

6.4
6.4.1
The control inputs INx and INH consist of TTL/CMOS compatible schmitt triggers with hysteresis which control the
integrated gate drivers for the MOSFETs. To set the device in stand-by mode, INH and INx pins need to be all
connected to GND. When the INH is high, in each half bridge one of the two power switches (HSx or LSx) is
switched on, while the other power switch is switched off, depending on the status of the INx pin. When INH is low,
a high INx signal will turn the corresponding highside switches on. This provides customer the possibility to switch
on one high side switch while keeping the other switches off and therefore to do an open load detection together
with external circuitry (see also
both power switches. To drive the logic inputs no external driver is needed, therefore the BTM7752G can be
interfaced directly to a microcontroller.
6.4.2
In bridge applications it has to be assured that the highside and lowside MOSFET are not conducting at the same
time, connecting directly the battery voltage to GND. This is assured by a circuit in the driver IC, which senses the
status of the MOSFETs to ensure that the high or low side switch can be switched on only if the corresponding
low or high side switch is completely turned off.
6.4.3
The status pin IS is used as a combined current sense and error flag output. In normal operation (current sense
mode), a current source is connected to the status pin, which delivers a current proportional to the forward load
current flowing through the active high side switch. If the high side switch is inactive or the current is flowing in the
reverse direction no current will be driven except for a marginal leakage current I
are in on state, the IS provides the sense current of the high side switch, which has been turned on first. To reset
this assignment both inputs IN1 and IN2 has to be set to low and both high side switches has to be off.
The external resistor R
current sense ratio k
the status output is connected to a current source which is independent of the load current and provides I
The maximum voltage at the IS pin is determined by the choice of the external resistor and the supply voltage. In
case of current limitation the I
Figure 13
Data Sheet
I
IS
current sense mode
Status Flag Diagnosis with Current Sense Capability
Control and Diagnostics
Input Circuit
Dead Time Generation
I
Sense current and fault current
IS(lim)
Normal operation:
~ I
Load
ILIS
IS
= I
determines the voltage per output current. E.g. with the nominal value of 3.1k for the
L
Sense
output
logic
/ I
VS
ESD-ZD
IS
IS(lim)
, a resistor value of R
Chapter 7
is activated for 1.5 *
IS
- Application Information). A low on all INx and INH signal will turn off
R
IS
V
IS
IS
= 1kΩ leads to V
17
t
CLS
.
I
IS(lim)
Fault condition:
error flag mode
IS
Block Description and Characteristics
= ( I
L
/ 3.1A)V. In case of a fault condition
Sense
output
logic
VS
ESD-ZD
IS(LK)
High Current H-Bridge
. If both high side switches
Rev. 2.0, 2010-05-28
IS
R
IS
BTM7752G
V
IS
IS(lim)
.