HFC0310 –FIXED-FREQUENCY FLYBACK CONTROLLER

HFC0310 Rev. 1.01

www.MonolithicPower.com

4

6/19/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

Driving Signal (Pin Drv)

Sourcing Resistor

20

Ω

Sinking Resistor

10

Ω

Supply Voltage Management (Pin Vcc)

11

12

13

V

8.5

9.3

10

V

Start-Up Current

0.5V,

Before

start up

12

20

μA

23.3

24.5

25.7

V

5.7

6.2

6.7

V

Internal IC Consumption, Protection

Phase

8

10

μA

Feedback Management (Pin FB)

Internal Pull-Up Resistor

12.5

14

15.5

kΩ

Internal Pull-Up Voltage

4.5

V

FB to Current-Set–Point Division Ratio

3

Internal Soft-Start Time

3

ms

Falling FB Level Where the Regulator

Enters Burst Mode

0.5

V

Rising FB Level where the Regulator

Exits Burst Mode

0.7

V

Over-Load Set Point

3.5

3.8

4

V

Over-Load Delay Time

Fs=100kHz

82

ms

Timing Capacitor(FSET)

Maximum Voltage on the FSET

Capacitor

0.83

0.87

0.91

V

Source Current

45

53

61

μA

FSET Capacitor Discharge Time (Active

at drive turn on)

400

ns

Frequency Spectrum Shaping range, in

percentage of Fs

±3.5

%

Current Sampling Management (CS)

Leading-Edge Blanking for Current

Sensor

350

ns

Leading-Edge Blanking for SCP

240

ns

Maximum Current Set-Point

0.91

0.95

0.98

V

Short-Circuit–Protection Set Point

1.55

1.65

1.75

V

Internal-Slope–Compensation Ramp

38

mV/μs

Protection Management (PRO)

Protection Voltage

3.1

3.25

3.4

V

Protection Hysteresis

0.2

V