HFC0400 – FIXED-FREQUENCY FLYBACK CONTROLLER WITH ULTRA-LOW NO LOAD POWER CONSUMPTION
ELECTRICAL CHARACTERICS
(continued)
For typical value T
J
=25°C, unless otherwise noted
Parameter
Feedback (FB )
Internal Pull-Up Resistor
Internal Pull-Up Voltage
V
FB
to Internal Current Set-Point Division
Ratio
FB Level (Falling) at which the Controller
Enters Burst Mode
FB Level (Rising) at which the Controller
Exits Burst Mode
Over Load Protection
FB Level at which the Controller Enters OLP
after Blanking Time
Time Duration When FB Reaches Protection
Point, Before OLP
Frequency Foldback
Frequency Foldback FB Voltage Threshold,
Upper Limit
Minimum Switching Frequency
Frequency Foldback FB Voltage Threshold,
Lower Limit
Latch-Off Input (Integration in TIMER )
The Threshold below which Controller is
Latched
Blanking Duration on Latch Detection
DRV Voltage
Driver Voltage High Level
Driver Voltage-Clamp Level
Driver Voltage, Low Level
Driver Voltage, Rise Time
Driver Voltage, Fall Time
Driver Pull-Up Resistance
Driver Pull-Down Resistance
V
High
V
Clamp
V
Low
τ
R
τ
F
R
Pull-up
R
Pull-down
C
L
=1nF V
CC
=8.4V
C
L
=1nF V
CC
=12V
C
L
=1nF, V
CC
=24V
C
L
=1nF, V
CC
=24V
C
L
=1nF, V
CC
=16V
C
L
=1nF, V
CC
=16V
C
L
=1nF, V
CC
=16V
C
L
=1nF, V
CC
=16V
6.7
10.3
13.4
16
13
23
8
20
V
V
V
mV
ns
ns
Ω
Ω
V
TIMER(LATCH)
τ
LATCH
0.9
1
12
1.1
V
μs
V
FB(FOLD)
f
OSC(min)
V
FB(FOLDE)
21
1.8
25
1.0
30
V
kHz
V
Symbol
R
FB
V
DD
K
FB
V
BURL
V
BURH
V
OLP
τ
OLP
C
TIMER
=47nF
50
0.29
0.42
Conditions
Min
12
Typ
13
4.3
3.0
0.32
0.46
0.35
0.50
Max
14
Unit
kΩ
V
--
V
V
3.7
V
ms
HFC0400 Rev. 1.0
11/28/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
5
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