dpa422 Power Integrations, Inc., dpa422 Datasheet - Page 23

• Manufacturer Part Number: dpa422
• Description: Highly Integrated Dc-dc Converter Ics For Power Over Ethernet & Telecom Applications
• Manufacturer: Power Integrations, Inc.

www.powerint.com
Line-Sense (L) and External Current Limit (X) Inputs (cont.)
L Pin Short Circuit
Current
X Pin Short Circuit
Current
Line Pin Voltage
(Positive Current)
X Pin Voltage
(Negative Current)
Maximum Duty Cycle
Reduction Onset
Threshold Current
Remote OFF DRAIN
Supply Current
L Pin Voltage Turn-On
Threshold in
Synchronous Mode
On-Time Pulse Width
for Synchronization
Off-Time Pulse Width
for Synchronization
Synchronous Turn-On
Delay
Frequency (F) Input
FREQUENCY Pin
Threshold Voltage
FREQUENCY Pin Input
Current
FREQUENCY Pin
Delay Time
Circuit Protection
Self Protection
Current Limit
(See Note B)
Parameter
Symbol
t
t
delay(sync)
t
ton(sync)
ID(RMT)
V
delay(VF)
off(sync)
I
I
I
IL(DC)
L(SC)
X(SC)
VL
VX
LIMIT
V
L(TH)
I
F
F
From Synchronous On to Drain Turn-On
T
SOURCE = 0 V; T
V
J
X
= 25 °C
V
= 0 V
V
(Unless Otherwise Specifi ed)
D
X
= 40 V
= 0 V
See Figure 33
f
f
OSC
OSC
Conditions
I
X
I
T
X
DPA422 di/dt = 225 mA/μs
DPA423 di/dt = 300 mA/μs
DPA424 di/dt = 600 mA/μs
DPA425 di/dt = 1.25 A/μs
DPA426 di/dt = 1.75 A/μs
V
= -150 μA
V
J
Remote OFF Using L Pin
V
= -50 μA
V
I
= 400 kHz
= 300 kHz
I
L
= 25 °C
F
L
L
L
F
= 0 V
= I
= 0 V
= I
= V
= V
J
UV
OV
Normal Mode
= -40 to 125 °C
C
C
V
L
= Floating
V
L
= V
C
-230
-270
-105
2.05
0.25
0.86
1.16
2.32
4.65
6.50
Min
175
120
120
2.1
0.6
1.1
0.935
-0.38
-170
-230
2.35
1.35
1.25
1.25
2.50
5.00
7.00
Typ
240
-85
2.5
0.6
0.9
55
17
DPA422-426
1
2250
3080
Max
-185
1.34
2.68
5.35
7.50
380
250
120
-65
2.6
2.9
1.1
1.5
1.4
7.7
1.0
4
2
Units
Rev. S 12/07
mA
μA
μA
μA
μA
ns
μs
ns
μs
V
V
V
A
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