TYPICAL APPLICATIONS
TYPICAL APPLICATIONS
VSYS
+12V Nom.
To Other
VPUMP
D1
C1
PUMP
Main
D2
VPWR
C2
VSUP
C6
Two Phases
Charge
Pump
Trickle
Hold
PGND
5V
Reg.
VDD
VLS
Reg.
Charge
Pump
-Off
Circuit
VLS
Oscillator
C3
UV
Detect
3x
VDD
C4
RST
INT
EN1
T-Lim
VSUP
High
-Side
Px_BOOT
Cx_Boot
Rg_HS
QHS
-
EN2
Px_HS
Px_LS
3
3
Control
Logic
Desat.
Comp.
+
1.4V
Driver
Px_HS_G
(Optional)
Phase x
Output
To Motor
CS
SI
Px_HS_S
SCLK
SO
PHASE_x
OC_OUT
GND
3
Over-Cur.
Comp.
I-sense
Amp.
Phase VSUP
Comp.
Low
-Side
Driver
Px_LS_G
Px_LS_S
Rg_LS
(Optional)
R1
QLS
Phase
Return
OC_TH
+
-
AMP_OUT
AMP_N
AMP_P
VLS_CAP
C5
+
-
R3
R2
RSense
To ADC
Rfb
Figure 22. Typical Application Diagram Using Charge Pump (+12 V Battery System)
33937A
Analog Integrated Circuit Device Data
Freescale Semiconductor
41
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