33887 Datasheet, PDF (13/37 Pages) Freescale Semiconductor, Inc – 5.0 A H-Bridge with Load Current Feedback

ELECTRICAL CHARACTERISTICS
TIMING DIAGRAMS
>8A
6.5
0
[1]
[0] ^{IN1 IN2}
[1]
[0]
[1]
[0]
Active
Current
Limiting
on Low-Side
MOSFET
Short Circuit Detection Threshold
Typical Current Limit Threshold
High Current Load Being Regulated via Constant-OFF-Time PWM
Hard Short Detection and Latch-OFF
Moderate Current Load
IN1 or IN2
IN2 or IN1
IN1 or IN2
IN2 or IN1
[1]
Outputs
Outputs Operation
Tri-Stated (per Input Control Condition)
[0]
Time
Outputs
Tri-Stated
Figure 10. Operating States
8.0
t _on
t_aa
6.5
OIS_Sv_Che_LorrcStuhCrorierrcnt utCiMtirDcinueiimteDucmteTteThchrteiroesnhshoTolhdldreshold
t_bb
t_aa==TOrisutaptuet OCountpsutat nOtF-OFFTFimTeime
tt_bb==COI_Luu_Ir_MrtepBnultaLBniklmainitgkBinTlagimnTkeimTieme
TCLTyuiymprpricieitciannaltglPLCWWimuarMirtveineLngfotoarmd
Waveform
Hard short occurs.
05..00
HHaarrdd SOshuotprtuiDtsedtetceticotned ^{during t}_b
Sanhdorot _{uLtaptucthi-sOlFaFtched-off.}
TIME
Figure 11. Example Short Circuit Detection Detail on Low-Side MOSFET
Analog Integrated Circuit Device Data
Freescale Semiconductor
33887
13