cp494 Ceramate Technical Co., Ltd., cp494 Datasheet

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cp494

Manufacturer Part Number
cp494
Description
Switchmode Pulse Width Modulation Control Circuit
Manufacturer
Ceramate Technical Co., Ltd.
Datasheet
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:886-3-3214525
Fax:886-3-3521052
circuit designed primarily for SWITCHMODE power supply control.
1. Maximum thermal limits must be observed.
MAXIMUM RATINGS
unless otherwise noted.)
Power Supply Voltage
Collector Output Voltage
Collector Output Current
Amplifier Input Voltage Range
Power Dissipation @ T
Thermal Resistance,
Operating Junction Temperature
Storage Temperature Range
Operating Ambient Temperature Range
Derating Ambient Temperature
The CP494 is a fixed frequency, pulse width modulation control
Complete Pulse Width Modulation Control Circuitry
On–Chip Oscillator with Master or Slave Operation
On–Chip Error Amplifiers
On–Chip 5.0 V Reference
Adjustable Deadtime Control
Uncommitted Output Transistors Rated to 500 mA Source or Sink
Output Control for Push–Pull or Single–Ended Operation
Undervoltage Lockout
(Each transistor) (Note 1)
Junction–to–Ambient
SWITCHMODE Pulse Width Modulation Control Circuit
Rating
A
(Full operating ambient temperature range applies,
45 C
Symbol
I
C1
R
V
V
V
T
V
P
T
T
T
qJA
C1
, I
stg
CC
C2
IR
A
A
D
J
C2
,
–55 to +125
–0.3 to +42
0 to +70
Value
Page 1 of 11
1000
500
125
42
42
80
45
Unit
mW
C/W
mA
V
V
V
C
C
C
C
Email: server@ceramate.com.tw
Http: www.ceramate.com.tw
PIN CONNECTIONS
Rev 1.0 Apr.19,2004
CP494

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cp494 Summary of contents

Page 1

... SWITCHMODE Pulse Width Modulation Control Circuit The CP494 is a fixed frequency, pulse width modulation control circuit designed primarily for SWITCHMODE power supply control. Complete Pulse Width Modulation Control Circuitry On–Chip Oscillator with Master or Slave Operation On–Chip Error Amplifiers On–Chip 5.0 V Reference Adjustable Deadtime Control Uncommitted Output Transistors Rated to 500 mA Source or Sink Output Control for Push– ...

Page 2

... kW, unless otherwise noted the operating ambient temperature range that applies, unless otherwise noted. A Symbol V Reg Reg I C(off) I E(off Page CP494 Min Typ Max 7 – – – 200 C2 –0.3 – – ...

Page 3

... 2.0 kW 0.001 low high = 1.0 mA) ref , All other inputs and outputs open) Page CP494 Min Typ V – 2 – 5 – –0 –0 –2.0 ICR VOL f – ...

Page 4

... All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Tel:886-3-3214525 Fax:886-3-3521052 This device contains 46 active transistors. Figure 1. Representative Block Diagram Figure 2. Timing Diagram Page CP494 Email: server@ceramate.com.tw Http: www.ceramate.com.tw Rev 1.0 Apr.19,2004 ...

Page 5

... The output frequency will now be equal to that of the oscillator. The CP494 has an internal 5.0 V reference capable of sourcing load current for external bias circuits. The reference has an internal accuracy of $5.0% with a typical thermal drift of less than 50 mV over an operating temperature range ...

Page 6

... NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Tel:886-3-3214525 Fax:886-3-3521052 Figure 7. Emitter–Follower Configuration Page CP494 m Figure 5. Percent Deadtime versus Oscillator Frequency Output Saturation Voltage versus Emitter Current Figure 9. Standby Supply Current versus Supply Voltage Email: server@ceramate.com.tw Http: www.ceramate.com.tw Rev 1.0 Apr.19,2004 ...

Page 7

... All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Tel:886-3-3214525 Fax:886-3-3521052 Figure 11. Deadtime and Feedback Control Circuit Figure 13. Emitter–Follower Configuration Test Circuit and Waveform Email: server@ceramate.com.tw Http: www.ceramate.com.tw Page CP494 Rev 1.0 Apr.19,2004 ...

Page 8

... Figure 17. Output Connections for Single–Ended and Push–Pull Configurations * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Tel:886-3-3214525 Fax:886-3-3521052 Figure 14. Error–Amplifier Sensing Techniques Page CP494 Figure 16. Soft–Start Circuit Email: server@ceramate.com.tw Http: www.ceramate.com.tw Rev 1.0 Apr.19,2004 ...

Page 9

... Fax:886-3-3521052 m Conditions = 0.28 1 1.0 A 3.0 mV 0.06 1 P.A. 1 Page CP494 Figure 19. Operation with V > Using in External Zener Results Email: server@ceramate.com.tw Http: www.ceramate.com.tw Rev 1.0 Apr.19,2004 ...

Page 10

... NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Tel:886-3-3214525 Fax:886-3-3521052 Conditions 200 12 200 200 Page CP494 Results 3.0 mV 0.01% 5.0 mV 0.02 P.A.R.D. 250 mA 72% Email: server@ceramate.com.tw Http: www.ceramate.com.tw Rev 1.0 Apr.19,2004 ...

Page 11

... SWITCHMODE Pulse Width Modulation Control Circuit CP494N 19.4 0 7.62 2.54 0.5 0 DIP16 * All specs and applications shown above subject to change without prior notice. 1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN Tel:886-3-3214525 Fax:886-3-3521052 CP494 10.0 0 1.27 0.4 0.1 0.3Min. SOP16 Email: server@ceramate.com.tw Http: www.ceramate.com.tw Page CP494 0.15 Rev 1.0 Apr.19,2004 ...

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