Copyright

© ANPEC Electronics Corp.

Rev. A.1 - Jun., 2011

APW8700

www.anpec.com.tw

4

Electrical Characteristics (Cont.)

APW8700

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

CHIP ENABLE/FREQUENCY SETTING

RT/EN Source Current

RT/EN=GND

-

-

120

µA

RT/EN Shutdown Threshold

0.45

0.5

0.55

V

Enable Debounce time

RT/EN high debounce

-

200

-

µs

RT/EN Voltage

Ω

-

1

-

V

Switching Frequency Setting Range

100

-

800

kHz

Free Run Switching Frequency

Ω

255

300

345

kHz

Switching Frequency Accuracy

-15

-

15

%

SOFT-START

Soft-start Current

During Soft-start

-

20

-

µA

SS Source/Sink Current Capability

After Soft-start

-

200

-

µA

OSCILLATOR

Maximum Duty Cycle

-

85

-

%

Minmum Duty Cycle

-

0

-

%

Ramp Amplitude

-

1.5

-

V

POWER SAVING MODE

Threshold Voltage to Enter Dual

Phase

0.55

0.6

0.65

V

Hysteresis to Enter Single Phase

-

0.2

-

V

2 Phase to single phase debounce

Continuously

-

0.2

-

ms

REFERENCE VOLTAGE

Reference Voltage Accuracy

1.98

2.00

2.02

V

VREF Maximum Output Current

VREF=GND

20

-

-

mA

Reference Voltage Load Regulation

-5

-

5

mV

Ω

-5

-

5

mV

Output Voltage Accuracy

0.2

-

V

ERROR AMPLIFIER

Open-Loop DC Gain

(Note 4)

Ω, C

-

80

-

V/V

Open-Loop Bandwidth

(Note 4)

Ω, C

-

20

-

MHz

Slew Rate

(Note 4)

Ω, C

-

8

-

V/

µs

FB Input Leakage Current

-

0.1

0.5

µA

COMP High Voltage

Ω, C

-

4.8

-

V/

µs

COMP Low Voltage

Ω, C

-

0.2

-

µA

Maximum COMP Source Current

-

2

-

mA

Maximum COMP Sink Current

-

2

-

mA

Refer to figure 1 in the “Typical Application Circuits”. These specifications apply over V