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OB2211のメーカーはOn-Brightです、この部品の機能は「Primary-Side Regulation PWM Power Switch」です。 |
部品番号 | OB2211 |
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部品説明 | Primary-Side Regulation PWM Power Switch | ||
メーカ | On-Bright | ||
ロゴ | |||
このページの下部にプレビューとOB2211ダウンロード(pdfファイル)リンクがあります。 Total 10 pages
OB2211/OB2212
Primary-Side Regulation PWM Power Switch
GENERAL DESCRIPTION
OB2211/OB2212 is an offline PWM Power switch
for low power AC/DC charger and adaptor
applications. It operates in primary-side sensing and
regulation. Consequently, opto-coupler and TL431
could be eliminated from design. Proprietary
Constant Voltage (CV) and Constant Current (CC)
control is integrated as shown in the figure below.
In CC control, the current and output power setting
can be adjusted externally by the sense resistor Rs at
CS pin. In CV control, multi-mode operations are
utilized to achieve high performance and high
efficiency. Device operates in fixed frequency mode
at large load conditions, frequency reduction mode at
light/medium load and ‘Extended burst mode’ at
No/light load conditions.
OB2211/OB2212 offers power on soft start control
and complete protection coverage with auto-recovery
features including Cycle-by-Cycle current limiting,
VDD over-voltage clamp and UVLO, fail-safe
protection for open loop fault condition. Excellent
EMI performance is achieved with On-Bright
proprietary frequency shuffling technique together
with soft switching control at the totem pole gate
drive output with No-Y cap design.
FEATURES
Primary-side Sensing and Regulation With No
TL431 and Opto-coupler
Multi-mode Operation for High Efficiency
Programmable CV and CC Regulation
Adjustable Constant Current and Output Power
setting
Frequency Shuffling and Adjustable Gate Drive
Greatly Improving EMI
Power on Soft-start Time (4ms)
“Extended Burst Mode Control” for Improved
Efficiency and Minimum Standby Design
Built-in Leading Edge Blanking (LEB)
Cycle-by-Cycle Current Limiting
VDD Under Voltage Lockout with Hysteresis
(UVLO)
VDD Over Voltage Shutdown and Clamp
Auto-restart in Over Voltage condition
Fail-safe protection for open loop fault condition
APPLICATIONS
Low Power AC/DC offline SMPS for
Cell Phone Charger
Digital Cameras Charger
Small Power Adaptor
Auxiliary Power for PC, TV etc.
Linear Regulator/RCC Replacement
OB2211 is offered in SOP8 package.
OB2212 is offered in DIP8 package
Fig 1. Typical CC/CV Curve
TYPICAL APPLICATION
©On-Bright Electronics
On-Bright Confidential to MicroBridge
-1-
OB_DOC_DS_1100
1 Page Marking Information
OB2211/OB2212
Primary-Side Regulation PWM Power Switch
TERMINAL ASSIGNMENTS
Pin Num Pin Name
1 VDDG
2 VDD
3 INV
4 CS
5/6 Drain
7/8 GND
I/O Description
P Internal Gate Driver Power Supply
P IC DC power supply Input
Inverting input of error amplifier (EA). Connected to resistor divider from
I primary sensing winding reflecting output voltage. PWM duty cycle is
determined by EA output and current sense signal at pin 4.
I Current sense input
O
HV MOSFET Drain Pin. The Drain pin is connected to the primary lead of
the transformer
P Ground
Output Power Table
Product
OB2211
OB2212
230VAC±15%
Open Frame1
10W
20W
90-264VAC
Open Frame1
8W
12W
Notes:
1. Maximum practical continuous power in an open frame design with sufficient drain pattern as a heat sink, at 50℃ ambient.
©On-Bright Electronics
On-Bright Confidential to MicroBridge
-3-
OB_DOC_DS_1100
3Pages CHARACTERIZATION PLOTS
OB2211/OB2212
Primary-Side Regulation PWM Power Switch
©On-Bright Electronics
On-Bright Confidential to MicroBridge
-6-
OB_DOC_DS_1100
6 Page | |||
ページ | 合計 : 10 ページ | ||
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PDF ダウンロード | [ OB2211 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
OB2211 | Primary-Side Regulation PWM Power Switch | On-Bright |
OB2211H | Primary-Side PWM Power Switch | On-Bright Electronics |
OB2212 | Primary-Side Regulation PWM Power Switch | On-Bright |
OB2216 | Primary-Side Regulation PWM Power Switch | On-Bright |