TS3404CD TSC [Taiwan Semiconductor Company, Ltd], TS3404CD Datasheet

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TS3404CD

Manufacturer Part Number
TS3404CD
Description
PWM Buck Controller
Manufacturer
TSC [Taiwan Semiconductor Company, Ltd]
Datasheet
1.TS3404CD.pdf (5 pages)
TS3404
General Description
The TS3404 integrates Pulse Width Modulation (PWM) control circuit into a single chip, and makes simple work out of
implementing a complete control and protection scheme for a DC-DC step-down converter. The TS3404 provides simple
feedback loop compensation, 1.25V reference output, error amplifier, adjustable oscillator, soft start, under voltage lock
out (UVLO), short circuit protection(SCP) circuitry, and push pull output circuit.
The TS3404 is design for adjustable switching frequency by trimming time capacitor (CT), during low supply voltage
situation, the under voltage lock out (UVLO) makes sure that the output are off until the internal circuit operates normally.
The TS3404 is offered in DIP-8 and SOP-8 package.
Features
Applications
Absolute Maximum Rating
Supply Voltage
Amplifier Input Voltage
Collector Output Voltage
Source Current
Sink Current
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature 1.6mm(1/16”) from case for 10Sec.
PWM buck control circuit
Operating voltage can be up to 27V
Under voltage lock out (UVLO) protection
Soft start (SS) circuit
Short circuit Protection (SCP)
Variable oscillator frequency 300KHz (max)
1.25V voltage reference Output
LCD Monitor
xD-ROM, xDSL product
DC to DC converters in computers
Backlight inverter
Pin assignment:
1. Out
2. Vcc
3. Comp.
4. FB
5. SCP
6. SS
7. CT
8.
Gnd
PWM Buck Controller
1-5
Pin Descriptions
Ordering Information
TS3404
TS3404CS
TS3404CD
Part No.
I
Name
Output
Comp.
SOURCE
T
T
I
SCP
V
Gnd
Vcc
V
SINK
LEAD
FB
SS
CT
T
V
STG
CC
O
J
I
Oscillator Frequency up to 300KHz
Supply Voltage Range 3.6V to 27V
Output Driving Current 200mA
Feedback Loop Compensation
Timing Capacitor
PWM Output
Supply Voltage
Voltage Feedback
Short Circuit Protection
Soft Start
Ground
Operating Temp.
-20 ~ +85
(Ambient)
-20 ~ +150
-65 ~ +150
Vcc~1.0V
2003/12 rev. A
200
200
260
28
20
Description
o
C
SOP-8
DIP-8
Package
mA
mA
o
o
o
V
V
V
C
C
C

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TS3404CD Summary of contents

Page 1

... Name Output PWM Output Vcc Supply Voltage Comp. Feedback Loop Compensation FB Voltage Feedback SCP Short Circuit Protection SS Soft Start CT Timing Capacitor Gnd Ground Ordering Information Part No. Operating Temp. TS3404CS TS3404CD SOURCE I SINK STG T LEAD 1-5 Description Package (Ambient) ...

Page 2

Recommended Operating Conditions Parameter Supply voltage Amplifier input voltage Collector output voltage Current into feedback terminal Feedback resistor Timing capacitor Oscillator frequency Electrical Characteristics o (V =6V 200KHz, Ta =25 C; unless otherwise specified.) CC Parameter Symbol Reference ...

Page 3

Electrical Characteristics o (V =6V 200KHz, Ta =25 C; unless otherwise specified.) CC Parameter Symbol Output section Leakage current Sink current Source current Output saturation voltage Short circuit output current PWM comparator Input threshold voltage at f ...

Page 4

Typical Application Circuit Device Value C1 470uF C2 10nF C3 470uF C4 50nF C5 270uF C6 50nF C7 220nF Remark: * Output = 1.25V * (R1/R2 +1) = 1.25V * (9K/ SK34A: Taiwan ...

Page 5

DIP-8 Mechanical Drawing SOP-8 Mechanical Drawing TS3404 DIP-8 DIMENSION MILLIMETERS DIM MIN A 9.07 B 6.22 C 3.18 ...

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