Block Diagram - Pioneer PDP-4270XA Service Manual

1
A
LTC3414EFE (MAIN ASSY: IC4102)
• Regulator IC
Pin Arrangement (Top view)
SYNC/MODE
B

Block Diagram

C
19
VFB
0.74V
4 RUN
RUN/SS
D
0.86V
PGOOD 17
Pin Function
No. Pin Name I/O
E
−
1 PGND
2 RT
3 SYNC/MODE
4 RUN/SS
−
5 SGND
−
6 NC
−
7 PVIN
−
8 SW
F
−
9 SW
−
10 PGND
−
11 PGND
204
1
2
PGND 1 20 PGND
RT 2 19
VFB
3 18 ITH
RUN/SS 4 17 PGOOD
SVIN
SGND 5 16
21
NC 6 15 NC
PVIN 7 14
PVIN
SW 8 13 SW
SW 9 12 SW
PGND 10 11 PGND
SVIN SGND ITH EXPOSED PAD
16 5 18 21
SLOPE
0.8V VOLTAGE
COMPENSATION
REFERENCE
RECOVERY
ERROR
AMPLIFIER
+
BURST
V
SYNC/MODE
COMPARATOR
OSCILLATOR
RT
Pin Function
Power Ground.
I Oscillator Resistor Input.
Mode Select and External Clock
I
Synchronization Input.
I Run Control and Soft-Start Input.
Signal Ground.
Open. No internal connection.
Power Input Supply
Switch Node Connection to Inductor.
Switch Node Connection to Inductor.
Power Ground.
Power Ground.
2
3
PMOS CURRENT
COMPARATOR
BCLAMP
SLOPE
COMPENSATION
NMOS CURRENT
LOGIC COMPARATOR
CURRENT
REVERSAL
COMPARTOR
2 3
SYNC/MODE
No. Pin Name
12 SW
13 SW
14 PVIN
15 NC
16 SVIN
17 PGOOD
18 ITH
19 VFB
20 PGND
21 Exposed Pad
PDP-427XD
3
4
PVIN PVIN
7 14
P-CH
SW
8
SW
9
SW
12
SW
13
N-CH
1 PGND
10 PGND
11 PGND
20
PGND
I/O Pin Function
−
Switch Node Connection to Inductor.
−
Switch Node Connection to Inductor.
−
Power Input Supply.
−
Open. No internal connection.
Signal Input Supply.
I
O Power Good Output.
−
Error Amplifier Compensation Point.
I Feedback Pin.
−
Power Ground.
Should be connected to SGND and
−
soldered to the PCB.
4