TDA4718 查看數據表（PDF） - Infineon Technologies

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TDA4718

Control IC for single-ended and push-pull switching-mode power supplies

Infineon Technologies 

TDA 4700

TDA 4718

Characteristics (cont’d)

VS = 11 to 30 V; TA = – 25 to 85 °C

Parameter

Symbol

Limit Values

min.

typ. max.

Unit Test

Condition

Oscillator (VCO)

Frequency range

Frequency change

Frequency change

Tolerance

Fall time sawtooth

RC combination

VCO

Ramp Generator

fVCO

∆f/fVCO

∆f/fVCO

∆f/fVCO

t

t

CT

RT

40

–1

–7

0.82

5

100 000 Hz

0.5

%

1

%

7

%

1

µs

10

µs

47

nF

700

kΩ

14 V ± 20 %

25 V ± 20 %

∆RT = 0; ∆CT = 0

CT = 1 nF

CT = 10 nF

Frequency range

Maximum voltage

at CR

Minimum voltage

at CR

Input current

through RR

Current

transformation ratio

Synchronization

f

40

VH

VL

IRR

0

IRR/ICR

100 000 Hz

5.5

V

1.8

V

400

µA

1/4

Sync output

Sync input

Input current

VQ H

4

VQ L

VI H

2

VI L

– II

V

IQ H = – 200 µA

0.4

V

IQ L = 1.6 mA

V

0.8

V

5

µA

Semiconductor Group

13

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