Datasheet

Data Sheet 13 Rev. 2.0, 2010-05-28
High Current H-Bridge
BTM7752G
Block Description and Characteristics
6.2.3
V
S
= 13.5V, T
j
= -40 °C to +150 °C, R
Load
= 12 Ω, V
INH
= 5V, VS pins shorted, all voltages with respect to ground,
positive current flowing into pin (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Test Conditions
Min. Typ. Max.
High Side Switch Dynamic Characteristics
Rise-time of HS t
r(HS)
0.35 0.7 1.05 µs –
Slew rate HS on ΔV
OUT
/
t
r(HS)
– 9.6 – V/µs –
Switch on delay time HS t
dr(HS)
3 5 8 µs –
Fall-time of HS t
f(HS)
0.35 0.7 1.05 µs –
Slew rate HS off -ΔV
OUT
/
t
f(HS)
– 9.6 – V/µs –
Switch off delay time HS t
df(HS)
1.5 3.5 5.5 µs –
Low Side Switch Dynamic Characteristics
Rise-time of LS t
r(LS)
0.4 0.8 1.2 µs –
Slew rate LS off ΔV
OUT
/
t
r(LS)
– 8.4 – V/µs –
Switch off delay time LS t
dr(LS)
1.5 3.5 5.5 µs –
Fall-time of LS t
f(LS)
0.35 0.8 1.2 µs –
Slew rate LS on -ΔV
OUT
/
t
f(LS)
– 8.4 – V/µs –
Switch on delay time LS t
df(LS)
2.5 5 7.5 µs –
Power Stages - Dynamic Characteristics
6.3 Protection Functions
The device provides integrated protection functions. These are designed to prevent IC destruction under fault
conditions described in the data sheet. Fault conditions are considered as “outside” normal operating range.
Protection functions are not to be used for continuous or repetitive operation, with the exception of the current
limitation (
Chapter 6.3.4). Overvoltage, overtemperature and overcurrent are indicated by a fault current I
IS(LIM)
at
the IS pin as described in the paragraph “Status Flag Diagnosis with Current Sense Capability” on Page 17
and Figure 13.
In the following the protection functions are listed in order of their priority. Overvoltage lock out overrides all other
error modes.
6.3.1 Overvoltage Lock Out
To assure a high immunity against overvoltages (e.g. load dump conditions) the device shuts both lowside
MOSFETs off and turns both highside MOSFET on, if the supply voltage
V
S
is exceeding the over voltage
protection level
V
OV(OFF)
. The IC operates in normal mode again with a hysteresis V
OV(HY)
if the supply voltage
decreases below the switch-on voltage
V
OV(ON)
. This behavior of the BTM7752G will lead to freewheeling in
highside during over voltage.
6.2.7
6.2.8
6.2.9
6.2.10
6.2.11
6.2.12
6.2.13
6.2.14
6.2.15
6.2.16
6.2.17
6.2.18