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OB2211HのメーカーはOn-Bright Electronicsです、この部品の機能は「Primary-Side PWM Power Switch」です。 |
部品番号 | OB2211H |
| |
部品説明 | Primary-Side PWM Power Switch | ||
メーカ | On-Bright Electronics | ||
ロゴ | |||
このページの下部にプレビューとOB2211Hダウンロード(pdfファイル)リンクがあります。 Total 10 pages
OB2211H
Primary-Side PWM Power Switch with CC/CV
GENERAL DESCRIPTION
OB2211H 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. 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.
OB2211H offers power on soft start control and
protection coverage with auto-recovery features
including Cycle-by-Cycle current limiting, VDD
clamp and 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.
OB2211H achieves better CC control accuracy and
higher system efficiency through PWM control than
its sibling part OB2211.
FEATURES
Primary-side Sensing and Regulation Without
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 Clamp
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
OB2211H is offered in SOP8 package.
Fig 1. Typical CC/CV Curve
TYPICAL APPLICATION
©On-Bright Electronics
-1-
Confidential
OB_DOC_DS_11HA0
1 Page Marking Information
OB2211H
Primary-Side PWM Power Switch with CC/CV
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
OB2211H
230VAC±15%
Open Frame1
10W
85-264VAC
Open Frame1
7W
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
-3-
Confidential
OB_DOC_DS_11HA0
3Pages CHARACTERIZATION PLOTS
OB2211H
Primary-Side PWM Power Switch with CC/CV
©On-Bright Electronics
-6-
Confidential
OB_DOC_DS_11HA0
6 Page | |||
ページ | 合計 : 10 ページ | ||
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PDF ダウンロード | [ OB2211H 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 |