DataSheetWiki


OB2212 fiches techniques PDF

On-Bright - Primary-Side Regulation PWM Power Switch

Numéro de référence OB2212
Description Primary-Side Regulation PWM Power Switch
Fabricant On-Bright 
Logo On-Bright 





1 Page

No Preview Available !





OB2212 fiche technique
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

PagesPages 10
Télécharger [ OB2212 ]


Fiche technique recommandé

No Description détaillée Fabricant
OB2211 Primary-Side Regulation PWM Power Switch On-Bright
On-Bright
OB2211H Primary-Side PWM Power Switch On-Bright Electronics
On-Bright Electronics
OB2212 Primary-Side Regulation PWM Power Switch On-Bright
On-Bright
OB2216 Primary-Side Regulation PWM Power Switch On-Bright
On-Bright

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche