ML4841 데이터 시트보기 (PDF) - Fairchild Semiconductor

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ML4841

Variable Feedforward PFC/PWM Controller Combo

Fairchild Semiconductor 

PRODUCT SPECIFICATION

ML4841

Electrical Characteristics (continued)

Unless otherwise specified, ICC = 25mA, RT = 23kΩ, RRAMP1 = 28.7kΩ, CT = 400pF, CRAMP1 = 270pF, TA =

Operating Temperature Range (Note 1)

Symbol

Reference

Parameter

Conditions

Min. Typ. Max. Units

Output Voltage

Line Regulation

Load Regulation

Temperature Stability

Total Variation

TA = 25°C, I(VREF) = 1mA

VCCZ - 3V < VCC < VCCZ - 0.5V

1mA < I(VREF) < 20mA

Line, Load, Temp

7.4 7.5 7.6 V

2

10 mV

2

15 mV

0.4

%

7.25

7.65 V

PFC

Long Term Stability

TJ = 125°C, 1000 Hours

5

25 mV

Minimum Duty Cycle

Maximum Duty Cycle

Output Low Voltage

Output High Voltage

PWM

DC

Rise/Fall Time

Duty Cycle Range

VIEAO > 6.7V

VIEAO < 1.2V

IOUT = -20mA

IOUT = -100mA

IOUT = 10mA, VCC = 8V

IOUT = 20mA

IOUT = 100mA

CL = 1000pF

0

%

90 95

%

0.4 0.8 V

0.7 2.0 V

0.8 1.5 V

10 10.5

V

9.5 10

V

50

ns

0-44 0-47 0-50 %

VOL Output Low Voltage

VOH Output High Voltage

Rise/Fall Time

Supply

IOUT = -20mA

IOUT = -100mA

IOUT = 10mA, VCC = 8V

IOUT = 20mA

IOUT = 100mA

CL = 1000pF

0.4 0.8 V

0.7 2.0 V

0.8 1.5 V

10 10.5

V

9.5 10

V

50

ns

VCCZ

Shunt Regulator Voltage

VCCZ Load Regulation

VCCZ Total Variation

Start-up Current

Operating Current

Undervoltage Lockout

Threshold

Undervoltage Lockout

Hysteresis

25mA < ICC < 55mA

Load, Temp

VCC = 11.2V, CL = 0

VCC < VCCZ - 0.5V, CL = 0

12.8 13.5 14.2 V

±100 ±200 mV

12.4

14.6 V

0.7 1.0 mA

17 21 mA

VCCZ - VCCZ - VCCZ - V

1.0 0.7 0.4

2.7 3.0 3.3 V

Notes

1. Limits are guaranteed by 100% testing, sampling, or correlation with worst-case test conditions.

2. Includes all bias currents to other circuits connected to the VFB pin.

3. Gain = K x 5.3V; K = (IGAINMOD - IOFFSET) x IAC x (VEAO - 1.5V)-1.

REV. 1.0.3 6/13/01

5

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