Datasheet
Data Sheet 19 Rev. 2.0, 2010-05-28
High Current H-Bridge
BTM7752G
Block Description and Characteristics
6.4.4 Truth Table
Device State Inputs Outputs Mode
INH IN1 IN2 HS1 LS1 HS2 LS2 IS
Normal operation 0 0 0 OFF OFF OFF OFF 0 Stand-by mode, reset
1 0 0 OFF ON OFF ON 0 –
1 0 1 OFF ON ON OFF CS HS2
1) Previous current sense assignment to be reset by IN1=IN2=low and both high side switches off (see Chapter 6.4.3).
1)
–
1 1 0 ON OFF OFF ON CS HS1
1)
–
1 1 1 ON OFF ON OFF
2) When both high side switches are in on state, the CS provides the sense signal for the high side switch, which has been
turned on first.
CS
2)
–
Open-Load detection
mode
0 0 1 OFF OFF ON OFF CS HS2
1)
Enable Open-load detection
0 1 0 ON OFF OFF OFF CS HS1
1)
Enable Open-load detection
0 1 1 ON OFF ON OFF CS
2)
Over-voltage (OV) X X X ON OFF ON OFF 1 Shut-down of LSS, HSS
activated, error detected
Under-voltage (UV) X X X OFF OFF OFF OFF 0 UV lockout, reset
Overtemperature or
short circuit of HSS or
3) In short circuit of HSS or LSS, the junction temperature will arise and as soon as the over temperature shut down threshold
is reached the device will shut down and latch the status. Short circuit of HSS and LSS itself won’t be detected as failure.
LSS
3)
0 0 0 OFF OFF OFF OFF 0 Stand-by mode, reset of latch
1 X X OFF OFF OFF OFF 1 Shut-down with latch, error
detected
X 1 X
X X 1
Current limitation
mode half bridge 1
1 0 X ON OFF X X 1 Short Circuit in LS1 detected,
half bridge 2 operates in normal
mode
1 1 X OFF ON X X 1 Short Circuit in HS1 detected,
half bridge 2 operates in normal
mode
0 1 X OFF OFF X X 1 Short Circuit in HS1 detected
Current limitation
mode half bridge 2
1 X 0 X X ON OFF 1 Short Circuit in LS2 detected,
half bridge 1 operates in normal
mode
1 X 1 X X OFF ON 1 Short Circuit in HS2 detected,
half bridge 1 operates in normal
mode
0 X 1 X X OFF OFF 1 Short Circuit in HS2 detected
Inputs: Switches Status Flag IS:
0 = Logic LOW OFF = switched off CS = Current sense mode
1 = Logic HIGH ON = switched on 1 = Logic HIGH (error)
X = 0 or 1 X = switched on or off