Datasheet > AN4003

AN4003

更新时间： 2022-11-25 11:11:24

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		PC
页数	文件大小	规格书
28页	233K
描述
PC POWER SUPPLY DESIGN WITH KA3511

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数据手册

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AN4003 数据手册

5. ELECTRICAL CHARACTERISTICS

(V =20V, T =25°C)

Value

Characteristic

REFERENCE SECTION

Reference output voltage

Line regulation

Symbol

Test Condition

Min. Typ. Max. Unit

Vref

Iref=1mA

4.9

–

5.1

–

∆

Vref._LINE14V<V_CC<30V

2.0

1.0

0.01

∆

Load regulation

Vref._LOAD1mA<Iref<10mA

–

Temperature coefficient of Vref⁽¹⁾

Short-circuit output current

OSCILLATOR SECTION

Oscillation frequency

Vref/ T

-25°C<Ta<85°C

Vref=0

–

%/°C

∆

I_SC

fosc

C_T=0.01µF, R_T=12k

–

kHz

Frequency change with

temperature⁽¹⁾

fosc/T

DEAD TIME CONTROL SECTION

Input bias current

I_B(DT)

–

-2.0 -10

µA

Maximum duty voltage

Input threshold voltage

DC_MAX

V_TH(DT)

Pin19 (DTC)=0V

Zero Duty Cycle

Max. Duty Cycle

3.0

–

3.3

–

ERROR AMP SECTION

Inverting reference voltage

Input bias current

Open-loop voltage gain⁽¹⁾

Unit-gain bandwidth⁽¹⁾

Output sink current

Vref(EA)

I_B(EA)

G_VO

1.20 1.25 1.30

V_COMP=2.5V

–

-0.1 -1.0 µA

0.5V<V_COMP<3.5V

650

0.9

–

kHz

I_SINK

V_COMP=0.7V

V_COMP=3.5V

0.3

Output source current

PWM COMPARATOR SECTION

Input threshold voltage

OUTPUT SECTION

I_SOURCE

-2.0 -4.0

V_TH(PWM)Zero Duty Cycle

–

4.5

Output saturation voltage

Collector off-state current

Rising time

V_CE(SAT)

I_C(off)

T_R

I_C=200mA

–

1.1 1.3

V_CC=V_C=30V, V_E=0V

100 µA

100 200

50 200

Falling time

T_F

PROTECTION SECTION

Over voltage protection for 3.3V

V_OVP1

3.8

4.1 4.3

Rev C, November 1999

1...3 4 567 8 9...28

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