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PDF OB2216 Datasheet ( Hoja de datos )

Número de pieza OB2216
Descripción Primary-Side Regulation PWM Power Switch
Fabricantes On-Bright 
Logotipo On-Bright Logotipo

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OB2216 Hoja de datos, Descripción, Manual
OB2216
Primary-Side Regulation PWM Power Switch
GENERAL DESCRIPTION
OB2216 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.
OB2216 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.
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
OB2216 is offered in DIP8 package
Fig 1. Typical CC/CV Curve
TYPICAL APPLICATION
©On-Bright Electronics
-1-
Confidential
OB_DOC_DS_1601
Free Datasheet http://www.datasheet4u.net/

1 page

OB2216 pdf
OB2216
Primary-Side Regulation PWM Power Switch
ELECTRICAL CHARACTERISTICS
(TA = 25OC, VDD=VDDG=16V, if not otherwise noted)
Symbol
Parameter
Test Conditions
Min Typ Max Unit
Supply Voltage (VDD) Section
I DD ST
Standby Current
I DD op
Operation Current
UVLO(ON)
VDD Under Voltage
Lockout Enter
UVLO(OFF)
VDD Under Voltage
Lockout Exit
VDD_clamp
IDD=10mA
Current Sense Input Section
TLEB
LEB time
Vth_oc
V th_OC test
Td_oc
Propagation delay
ZSENSE_IN
Input Impedance
T_ss Soft start time
VDD=13.5V
Operation supply current
INV=1.25V, CS=0V, -
VDD=VDDG=20V
7.5
5
1.0
8.5
14.0 15
38
10 uA
mA
2.0
9.5 V
16.0 V
V
540
780 820 860
110
50
4
ns
mV
ns
Kohm
ms
CV Section
Freq
Freq_Burst
f/Freq
Normal mode frequency
Burst Mode Base
Frequency
Frequency shuffling range
45 50 55
22
+/-4
KHz
KHz
%
CC Section
Freq
Oscillation Frequency
Minimum frequency
Maximum frequency
12
50
KHz
KHz
Error Amplifier section
Vref_EA
Reference voltage for EA
Gdc DC gain of the EA
GBW
Unity gain bandwidth
1.21 1.25 1.29
50
37.5
V
dB
kHz
Power MOSFET Section
BVdss
MOSFET Off-state Drain-
Source Breakdown
Rdson
Static, Id=0.9A
600
4.4
5.5
V
Ώ
©On-Bright Electronics
-5-
Confidential
OB_DOC_DS_1601
Free Datasheet http://www.datasheet4u.net/

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