Harman Kardon DVD 37 (serv.man6) Service Manual ▷ View online
ST72F324L, ST72324BL
are not implemented). See See “I/O PORTS” on page 39. and
Section 12.8 I/O PORT PIN CHARACTER-
ISTICS
for more details.
3. OSC1 and OSC2 pins connect a crystal/ceramic resonator, or an external source to the on-chip oscil-
lator; see
lator; see
Section 1 INTRODUCTION
and
Section 12.5 CLOCK AND TIMING CHARACTERISTICS
for
more details.
4. On the chip, each I/O port has 8 pads. Pads that are not bonded to external pins are in input pull-up con-
figuration after reset. The configuration of these pads must be kept at reset state to avoid added current
consumption.
figuration after reset. The configuration of these pads must be kept at reset state to avoid added current
consumption.
1
harman/kardon
Service manual DVD37EU
Page 105 of 117
TL3472
HIGH-SLEW-RATE, SINGLE-SUPPLY OPERATIONAL AMPLIFIER
SLOS200G – OCTOBER 1997 – REVISED JULY 2003
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
D
Wide Gain-Bandwidth Product . . . 4 MHz
D
High Slew Rate . . . 13 V/
µ
s
D
Fast Settling Time . . . 1.1
µ
s to 0.1%
D
Wide-Range Single-Supply
Operation . . . 4 V to 36 V
Operation . . . 4 V to 36 V
D
Wide Input Common-Mode Range Includes
Ground (V
Ground (V
CC–
)
D
Low Total Harmonic Distortion . . . 0.02%
D
Large-Capacitance Drive
Capability . . . 10,000 pF
Capability . . . 10,000 pF
D
Output Short-Circuit Protection
description/ordering information
Quality, low-cost, bipolar fabrication with innovative design concepts is employed for the TL3472 operational
amplifier. This device offers 4 MHz of gain-bandwidth product, 13-V/
amplifier. This device offers 4 MHz of gain-bandwidth product, 13-V/
µ
s slew rate, and fast settling time, without
the use of JFET device technology. Although the TL3472 can be operated from split supplies, it is particularly
suited for single-supply operation because the common-mode input voltage range includes ground potential
(V
suited for single-supply operation because the common-mode input voltage range includes ground potential
(V
CC–
). With a Darlington transistor input stage, this device exhibits high input resistance, low input offset
voltage, and high gain. The all-npn output stage, characterized by no dead-band crossover distortion and large
output voltage swing, provides high-capacitance drive capability, excellent phase and gain margins, low
open-loop high-frequency output impedance, and symmetrical source/sink ac frequency response. This
low-cost amplifier is an alternative to the MC33072 and the MC34072 operational amplifiers.
output voltage swing, provides high-capacitance drive capability, excellent phase and gain margins, low
open-loop high-frequency output impedance, and symmetrical source/sink ac frequency response. This
low-cost amplifier is an alternative to the MC33072 and the MC34072 operational amplifiers.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP (P)
Tube of 25
TL3472CP
TL3472CP
0
°
C to 70
°
C
SOIC (D)
Tube of 50
TL3472CD
3472C
SOIC (D)
Reel of 2500
TL3472CDR
3472C
PDIP (P)
Tube of 25
TL3472IP
TL3472IP
–40
°
C to 105
°
C
SOIC (D)
Tube of 50
TL3472ID
Z3472
SOIC (D)
Reel of 2500
TL3472IDR
Z3472
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
1
2
3
4
8
7
6
5
1OUT
1IN–
1IN+
V
CC–
/GND
V
CC+
2OUT
2IN–
2IN+
2IN–
2IN+
D OR P PACKAGE
(TOP VIEW)
harman/kardon
Service manual DVD37EU
Page 106 of 117
harman/kardon
Service manual DVD37EU
Page 107 of 117
Product Specification
Low Cost Green-Mode PWM Controller for Flyback Converters
SG6848
© System General Corp.
- 1 -
www.sg.com.tw
Version 1.2(IRO33.0010.B0)
May.06, 2003
FEATURES
Green-Mode PWM
Supports the “Blue Angel” Standard
Low Start-up Current (5uA)
Low Operating Current (2mA)
Leading-Edge Blanking
Constant Output Power Limit
Universal Input
Built-in Synchronized Slope Compensation
Current Mode Operation
Cycle-by-cycle Current Limiting
Under Voltage Lockout (UVLO)
Programmable PWM Frequency
Gate Output Voltage Clamped at 15V
Low Cost
Few External Components Required
Small SOT-26 Package
Supports the “Blue Angel” Standard
Low Start-up Current (5uA)
Low Operating Current (2mA)
Leading-Edge Blanking
Constant Output Power Limit
Universal Input
Built-in Synchronized Slope Compensation
Current Mode Operation
Cycle-by-cycle Current Limiting
Under Voltage Lockout (UVLO)
Programmable PWM Frequency
Gate Output Voltage Clamped at 15V
Low Cost
Few External Components Required
Small SOT-26 Package
APPLICATIONS
General-purpose switching mode power supplies and
flyback power converters, such as
Battery chargers for cellular phones, cordless phones,
PDAs, digital cameras, and power tools
Power adapters for ink jet printers, video game
consoles, and portable audio players
Open-frame SMPS for TV/DVD standby and other
auxiliary supplies, home appliances, and consumer
electronics
electronics
Replacements for linear transformers and RCC
SMPS
PC 5V standby power.
DESCRIPTION
This highly-integrated PWM controller provides
several special enhancements designed to meet the low
standby-power needs of low-power SMPS. To minimize
standby power consumption, the proprietary green-mode
function provides off-time modulation to linearly
decrease the switching frequency under light-load
conditions. This green-mode function enables the power
supply to easily meet even the strictest power
conservation requirements.
standby-power needs of low-power SMPS. To minimize
standby power consumption, the proprietary green-mode
function provides off-time modulation to linearly
decrease the switching frequency under light-load
conditions. This green-mode function enables the power
supply to easily meet even the strictest power
conservation requirements.
The BiCMOS fabrication process enables reducing
the start-up current to 5uA, and the operating current to
2mA. To further improve power conservation, a large
start-up resistance can be used. Built-in synchronized
slope compensation ensures the stability of peak current
mode control. Proprietary internal compensation provides
a constant output power limit over a universal AC input
range (90VAC to 264VAC). Pulse-by-pulse current
limiting ensures safe operation even during short-circuits.
2mA. To further improve power conservation, a large
start-up resistance can be used. Built-in synchronized
slope compensation ensures the stability of peak current
mode control. Proprietary internal compensation provides
a constant output power limit over a universal AC input
range (90VAC to 264VAC). Pulse-by-pulse current
limiting ensures safe operation even during short-circuits.
To protect the external power MOSFET from being
damaged by supply over voltage, the SG6848’s output
driver is clamped at 15V. SG6848 controllers can be used
to improve the performance and reduce the production
cost of power supplies. The SG6848 is the best choice for
replacing linear and RCC-mode power adapters. It is
available in 8-pin DIP and 6-pin SOT-26 packages.
driver is clamped at 15V. SG6848 controllers can be used
to improve the performance and reduce the production
cost of power supplies. The SG6848 is the best choice for
replacing linear and RCC-mode power adapters. It is
available in 8-pin DIP and 6-pin SOT-26 packages.
TYPICAL APPLICATION
From auxiliary winding
FB
OUTPUT
SENSE
RI
GND
VDD
SG6848
R
IN
1.5M
R7
100
100
R
S
4.7
C6
472p
472p
R9
95k
95k
From bridge rectifier
120~ 380VDC
120~ 380VDC
harman/kardon
Service manual DVD37EU
Page 108 of 117
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