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OB2358 の電気的特性と機能

OB2358のメーカーはOn-Bright Electronicsです、この部品の機能は「Current Mode PWM Power Switch」です。


製品の詳細 ( Datasheet PDF )

部品番号 OB2358
部品説明 Current Mode PWM Power Switch
メーカ On-Bright Electronics
ロゴ On-Bright Electronics ロゴ 




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OB2358 Datasheet, OB2358 PDF,ピン配置, 機能
OB2358
Current Mode PWM Power Switch Freq Shuffling
GENERAL DESCRIPTION
OB2358 combines a dedicated current mode PWM
controller with a high voltage power MOSFET. It
is optimized for high performance, low standby
power, and cost effective off-line flyback converter
applications in sub 27W range.
OB2358 offers complete protection coverage with
automatic self-recovery feature including Cycle-by-
Cycle current limiting (OCP), over load protection
(OLP), VDD over voltage clamp and under voltage
lockout (UVLO). Excellent EMI performance is
achieved with On-Bright proprietary frequency
shuffling technique together with soft switching
control at the totem pole gate drive output.
www.TDahteaStohneeete4Un.ecrogmy at below 20KHZ is minimized in the
design and audio noise is eliminated during operation.
OB2358 is offered in DIP8 package.
FEATURES
Power on Soft Start Reducing MOSFET Vds
Stress
Frequency shuffling for EMI
Extended Burst Mode Control For Improved
Efficiency and Minimum Standby Power Design
Audio Noise Free Operation
Fixed 50KHZ Switching Frequency
Internal Synchronized Slope Compensation
Low VDD Startup Current and Low Operating
Current
Leading Edge Blanking on Current Sense Input
Good Protection Coverage With Auto Self-
Recovery
o VDD Over Voltage Clamp and Under Voltage
Lockout with Hysteresis (UVLO)
o On-Bright Proprietary Line Input Compensated
Cycle-by-Cycle Over-current Threshold Setting
For Constant Output Power Limiting Over
Universal Input Voltage Range.
o Overload Protection (OLP).
o Over voltage Protection(OVP)
APPLICATIONS
Offline AC/DC flyback converter for
AC/DC adaptor
PDA power supplies
Digital Cameras and Camcorder Adaptor
VCR, SVR, STB, DVD&DVCD Player SMPS
Set-Top Box Power
Auxiliary Power Supply for PC and Server
Open-frame SMPS
TYPICAL APPLICATION
Output Power Table
406442781
Product
OB2358
230VAC±15%
Open Frame1
27W
85-265VAC
Open Frame1
16W
Notes:
1. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50ambient.
©On-Bright Electronics
On-Bright Confidential to Microbridge
- 1 - OB_DOC_DS_5800

1 Page





OB2358 pdf, ピン配列
OB2358
Current Mode PWM Power Switch Freq Shuffling
TERMINAL ASSIGNMENTS
Pin Name
GND
FB
VDD-G
SENSE
VDD
Drain
I/O Description
P Ground
I Feedback input pin. The PWM duty cycle is determined by voltage level into this pin
and the current-sense signal at Pin 4.
P Internal Gate Driver Power Supply
I Current sense input
P IC DC power supply Input
O HV MOSFET Drain Pin. The Drain pin is connected to the primary lead of the
transformer
www.DaBtaLSOheCet4KU.cDomIAGRAM
©On-Bright Electronics
-3-
Confidential
OB_DOC_DS_5800


3Pages


OB2358 電子部品, 半導体
OB2358
Current Mode PWM Power Switch Freq Shuffling
CHARACTERIZATION PLOTS
(The characteristic graphs are normalized at Ta=25℃)
UVLO(ON)(V) vs Temperature(C)
10.00
9.80
9.60
9.40
9.20
9.00
-40
-10
www.DataSheet4U.com
T2e0mpera5t0ure(C)80
110
UVLO(OFF)(V)VS Temp(C)
15.9
15.8
15.7
15.6
15.5
15.4
15.3
-40 -10 20 50 80
Temperature(C)
110
Istartup(uA) vs Temperature(C)
4.0
3.5
3.0
2.5
2.0
-40 -10
20 50 80
Temperature(C)
110
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
Ivdd vs Vdd
5
10
15
20
25
30
Vdd(V)
1.10
Vth_OC(V)vs duty(%)
1.00
0.90
0.80
0.70
0
15 30 45 60 75
Duty(%)
10
8
6
4
2
0
25
MOSFET Rdson vs Temperature
50 75 100 125
Temperature(℃)
150
Fosc(KHz) vs Temperature(C)
52.0
51.0
50.0
49.0
48.0
-40 -10
20 50 80
Temperature(C)
110
©On-Bright Electronics
-6-
Confidential
OB_DOC_DS_5800

6 Page



ページ 合計 : 9 ページ
 
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共有リンク

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