SD4844 Silan Microelectronics, SD4844 Datasheet - Page 5

• Manufacturer Part Number: SD4844
• Description: (SD4840 - SD4844) Current Mode PWM Controller
• Manufacturer: Silan Microelectronics

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PIN CONFIGURATION
PIN DESCRIPTION
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: //www.silan.com.cn
Built-in Soft Start Time
Current Limit
Peak Current
Limit
Burst mode
Burst Mode High Voltage
Burst Mode Low Voltage
Protection Section
Overvoltage Protection
Thermal Shutdown
Leading-edge Blanking Time
Total Standby Current
Start Current
Supply Current (Control Part)
Pin No.
6,7,8
3
4
1
2
5
Characteristics
SD4840P67K65
SD4841P67K65
SD4842P67K65
SD4843P67K65
SD4844P67K65
Pin Name
SGND
PGND
Drain
V
NC
FB
CC
I/O
Symbol
I/O
O
V
V
-
-
-
-
T
V
I
I
BURH
BURL
T
over
start
I
LEB
t
ovp
op
sd
s
Ground for control part.
MOSFET Ground.
Power supply pin.
Feedback input pin.
Not connected.
Drain pins.
V
Max. inductor current
V
V
FB
CC
CC
=4V
=11V
=12V
Test conditions
SD4840/4841/4842/4843/4844
Function description
Min.
0.53
0.67
0.80
1.10
1.35
0.25
125
200
0.4
10
18
--
1
Typ.
0.60
0.75
0.90
1.20
1.50
0.35
140
0.5
15
19
--
6
3
REV:1.2
Max.
0.67
0.83
1.00
1.30
1.65
0.45
0.6
20
20
--
--
--
5
Page 5 of 11
2008.12.17
Unit
mA
ms
μA
°C
ns
A
V
V
V