DPA424R Power Integrations, DPA424R Datasheet - Page 3

• Manufacturer Part Number: DPA424R
• Description: IC CONV DC-DC DPA SWITCH TO263-7
• Manufacturer: Power Integrations
• Series: DPA-Switch®r

Specifications of DPA424R

• Applications: Converter, Power Over Ethernet and Telecom Applications
• Voltage - Input: 16 ~ 75 V
• Number Of Outputs: 1
• Voltage - Output: 220V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (6 leads + tab, variant)
• Output Voltage: 9 V
• Output Current: 3.5 A
• Input Voltage: - 0.3 V to + 220 V
• Switching Frequency: 282 KHz to 425 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 79 %
• For Use With: DAK-21A - KIT DESIGN ACCELERATOR DPA SW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pin Functional Description
DRAIN (D) Pin:
High voltage power MOSFET drain output. The internal startup
bias current is drawn from this pin through a switched high-
voltage current source. Internal current limit sense point for
drain current.
CONTROL (C) Pin:
Error amplifier and feedback current input pin for duty cycle
control. Internal shunt regulator connection to provide
internal bias current during normal operation. It is also used
as the connection point for the supply bypass and auto-restart/
compensation capacitor.
LINE-SENSE (L) Pin:
Input pin for overvoltage (OV), under-voltage (UV) lock out,
line feed-forward with the maximum duty cycle (DC
reduction, remote ON/OFF and synchronization. A connection
to SOURCE pin disables all functions on this pin.
EXTERNAL CURRENT LIMIT (X) Pin:
Input pin for external current limit adjustment and remote
ON/OFF. A connection to SOURCE pin disables all functions
on this pin.
FREQUENCY (F) Pin:
Input pin for selecting switching frequency: 400 kHz if
Figure 2. Functional Block Diagram.
CURRENT LIMIT (X)
FREQUENCY (F)
LINE-SENSE (L)
EXTERNAL
CONTROL (C)
R E
Z C
I FB
SHUNT REGULATOR/
ERROR AMPLIFIER
CURRENT
ADJUST
LIMIT
SENSE
LINE
+
V BG + V T
V BG
-
V C
1 V
V I (LIMIT)
ON/OFF
5.8 V
OV/UV
DC MAX
START
SOFT
STOP LOGIC
OSCILLATOR
5.8 V
4.8 V
COMPARATOR
INTERNAL UV
DC MAX
300/400 kHz
STOP SOFT-
+
-
START
CLOCK
D MAX
SAW
MAX
SKIPPING
CYCLE
)
SOFT START
connected to SOURCE pin and 300 kHz if connected to
CONTROL pin.
SOURCE (S) Pin:
Output MOSFET source connection for the power return.
Primary side control circuit common and reference point.
Figure 3. Pin Configuration (top view).
COMPARATOR
(TO-263-7C)
(MO-169-7C)
R Package
AUTO-RESTART
SHUTDOWN/
HYSTERETIC
PWM
SHUTDOWN
THERMAL
S-PAK
+
-
÷ 8
0
1
INTERNAL
SUPPLY
C L X S F
1 2 3 4 5
C L X S F
1 2 3 4 5
S
R
Q
D
7
D
7
CONTROLLED
GATE DRIVER
CURRENT LIMIT
COMPARATOR
(See layout considerations)
TURN-ON
Tab Internally Connected
C
L
X
F
G Package (SMD-8)
+
BLANKING
-
P Package (DIP-8)
LEADING
EDGE
DPA423-426
to SOURCE Pin
2
3
4
1
PI-2760-070501
PI-4030-071305
7/05
DRAIN (D)
SOURCE (S)
P
8
7
6
5
3
S
S
S
D