Harman Kardon AVR 158 (serv.man3) Service Manual ▷ View online
TPS65251
SLVSAA4B – JUNE 2010 – REVISED JANUARY 2011
www.ti.com
TERMINAL FUNCTIONS (DCA)
NAME
NO.
I/O
DESCRIPTION
RLIM3
1
I
Current limit setting for Buck 3. Fit a resistor from this pin to ground to set
the peak current limit on the output inductor.
the peak current limit on the output inductor.
SS3
2
I
Soft start pin for Buck 3. Fit a small ceramic capacitor to this pin to set the
converter soft start time.
converter soft start time.
COMP3
3
O
Compensation for Buck 3. Fit a series RC circuit to this pin to complete
the compensation circuit of this converter.
the compensation circuit of this converter.
FB3
4
I
Feedback input for Buck 3. Connect a divider set to 0.8V from the output
of the converter to ground.
of the converter to ground.
SYNC
5
I
Synchronous clock input. If there is a sync clock in the system, connect to
the pin. When not used connect to GND.
the pin. When not used connect to GND.
ROSC
6
I
Oscillator set. This resistor sets the frequency of internal autonomous
clock. If external synchronization is used resistor should be fitted and set
to ~70% of external clock frequency.
clock. If external synchronization is used resistor should be fitted and set
to ~70% of external clock frequency.
FB1
7
I
Feedback pin for Buck 1. Connect a divider set to 0.8 V from the output of
the converter to ground.
the converter to ground.
COMP1
8
O
Compensation pin for Buck 1. Fit a series RC circuit to this pin to
complete the compensation circuit of this converter.
complete the compensation circuit of this converter.
SS1
9
I
Soft start pin for Buck 1. Fit a small ceramic capacitor to this pin to set the
converter soft start time.
converter soft start time.
RLIM1
10
I
Current limit setting pin for Buck 1. Fit a resistor from this pin to ground to
set the peak current limit on the output inductor.
set the peak current limit on the output inductor.
EN1
11
I
Enable pin for Buck 1. A low level signal on this pin disables it. If pin is
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
BST1
12
I
Bootstrap capacitor for Buck 1. Fit a 47-nF ceramic capacitor from this pin
to the switching node.
to the switching node.
VIN1
13
I
Input supply for Buck 1. Fit a 10-µF ceramic capacitor close to this pin.
LX1
14, 15
O
Switching node for Buck 1
LX2
16, 17
O
Switching node for Buck 2
VIN2
18
I
Input supply for Buck 2. Fit a 10-µF ceramic capacitor close to this pin.
BST2
19
I
Bootstrap capacitor for Buck 2. Fit a 47-nF ceramic capacitor from this pin
to the switching node.
to the switching node.
EN2
20
I
Enable pin for Buck 2. A low level signal on this pin disables it. If pin is
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
left open a weak internal pull-up to V3V will allow for automatic enable.
For a delayed start-up add a small ceramic capacitor from this pin to
ground.
RLIM2
21
I
Current limit setting for Buck 2. Fit a resistor from this pin to ground to set
the peak current limit on the output inductor.
the peak current limit on the output inductor.
SS2
22
I
Soft start pin for Buck 2. Fit a small ceramic capacitor to this pin to set the
converter soft start time.
converter soft start time.
COMP2
23
O
Compensation pin for Buck 2. Fit a series RC circuit to this pin to
complete the compensation circuit of this converter
complete the compensation circuit of this converter
FB2
24
I
Feedback input for Buck 2. Connect a divider set to 0.8 V from the output
of the converter to ground.
of the converter to ground.
LOW_P
25
I
Low power operation mode(active high) input for TPS65251
GND
26
Ground pin
PGOOD
27
O
Power good. Open drain output asserted after all converters are
sequenced and within regulation. Polarity is factory selectable (active high
default).
sequenced and within regulation. Polarity is factory selectable (active high
default).
V7V
28
O
Internal supply. Connect a 10-µF ceramic capacitor from this pin to
ground.
ground.
V3V
29
O
Internal supply. Connect a 10-µF ceramic capacitor from this pin to
ground.
ground.
AGND
30
Analog ground. Connect all GND pins and the power pad together.
GND
31
Ground pin
4
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Copyright © 2010–2011, Texas Instruments Incorporated
Product Folder Link(s):
TPS65251
Harman Kardon
AVR 156+158/230V Service Manual
Page 113 of 139
©
1996
DATA SHEET
MOS FIELD EFFECT TRANSISTOR
µ
PA672T
N-CHANNEL MOS FET ARRAY
FOR SWITCHING
The
µ
PA672T is a super-mini-mold device provided
with two MOS FET elements. It achieves high-density
mounting and saves mounting costs.
FEATURES
•
Two MOS FET circuits in package the same size as
SC-70
•
Automatic mounting supported
ABSOLUTE MAXIMUM RATINGS (T
A
= 25 ˚C)
PARAMETER
SYMBOL
TEST CONDITIONS
RATINGS
UNIT
Drain to Source Voltage
V
DSS
50
V
Gate to Source Voltage
V
GSS
±
7.0
V
Drain Current (DC)
I
D(DC)
100
mA
Drain Current (pulse)
I
D(pulse)
PW
≤
10 ms, Duty Cycle
≤
50 %
200
mA
Total Power Dissipation
P
T
200 (Total)
mW
Channel Temperature
T
ch
150
˚C
Storage Temperature
T
stg
–55 to +150
˚C
Document No. G11259EJ1V0DS00 (1st edition)
Date Published June 1996 P
Printed in Japan
Date Published June 1996 P
Printed in Japan
PACKAGE DIMENSIONS (in millimeters)
0.2
+0.1
–0
–0
0.15
+0.1
–0.05
–0.05
2.1 ±0.1
1.25 ±0.1
0.65
1.3
0.7
2.0 ±0.2
0.9 ±0.1
0 to 0.1
0.65
6
1
5
2
4
3
PIN CONNECTION
6
5
4
1
2
3
1.
2.
3.
4.
5.
6.
Marking: MA
2.
3.
4.
5.
6.
Marking: MA
Source 1
Gate 1
Drain 2
Source 2
Gate 2
Drain 1
Gate 1
Drain 2
Source 2
Gate 2
Drain 1
(S1)
(G1)
(D2)
(S2)
(G2)
(D1)
(G1)
(D2)
(S2)
(G2)
(D1)
Harman Kardon
AVR 156+158/230V Service Manual
Page 114 of 139
Harman Kardon
AVR 156+158/230V Service Manual
Page 115 of 139
Harman Kardon
AVR 156+158/230V Service Manual
Page 116 of 139
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