MPC1825A – DC/DC CONVERTER AND BATTERY CHARGER
Pin
Name
Direction
Description
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1
DCIN
+DC
DC power supply input
2
RS
→
DC/DC converter
detection input of charge current (battery charger block)
3
RF2
→
DC/DC converter
connection of error amplifier feedback resistor (battery charger block)
4
INM2
→
DC/DC converter
inverting input of error amplifier (battery charger block)
5
RF1
DC/DC converter
→
connection of feedback resistor (switched power supply block)
6
INM1
→
DC/DC converter
inverting input of error amplifier (switched power supply block)
7
INP1
→
DC/DC converter
non-inverting input of error amplifier (switched power supply block)
8
DTC
→
DC/DC converter
dead time control input (switched power supply block)
9
VREF
DC/DC converter
→
reference voltage output
10
REFIN
→
DC/DC converter
external reference voltage input
11
BATIN
→
DC/DC converter
input voltage supervises battery cell
12
LOBAT
DC/DC converter
→
µP
low volatge detection output
13
CKOUT
DC/DC converter
→
servo driver
clock output
14
RSTB
DC/DC converter
→
µP
reset signal output
15
SYCSL
GND
88.2kHz/176.4kHz mode select input
16
SYNC
GND
external clock input
17
PCB
µP
→
DC/DC converter
system control input
18
CHGON
µP
→
DC/DC converter
system control input
19
GND
GND
ground
20
VCPU
DC/DC converter
→
+µP
3V regulated voltage output
21
VOUT3
not connected
DC/DC converter control signal output for system power supply
22
SW
+A
DC/DC converter driver output for system power supply (open drain)
23
VDO
DC/DC converter
→
DC/DC converter output for system power supply
24
C2L
external connection
capacitor connection for charge pump
25
C1L
external connection
capacitor connection for charge pump
26
C1H
external connection
capacitor connection for charge pump
27
C2H
external connection
capacitor connection for charge pump
28
VG
DC/DC converter
→
VG
charge pump circuit output
29
VOUT1
DC/DC converter
→
external driver control signal at DC/DC converter
30
VIN
→
DC/DC converter
battery connection (+)
31
DCDTB
DC/DC converter
→
DCIN detection circuit output
32
CHGOUT
not connected
rechargable battery voltage detection circuit output
33
BATM
DC/DC converter
→
battery (-)
battery connection (-)
34
CHGFIL
external connection
external filter capacitor connection for battery charger voltage detection
35
VOUT2
DC/DC converter
→
external driver control signal (battery charger voltage block)
36
CHGSW
DC/DC converter
→
battery charger switch control output
3-9
CS 46 470
