EM8631 PDF даташит
Спецификация EM8631 изготовлена «Excelliance MOS» и имеет функцию, называемую «PWM Controller». |
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Детали детали
Номер произв | EM8631 |
Описание | PWM Controller |
Производители | Excelliance MOS |
логотип |
11 Pages
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Green mode PWM Flyback Controller
EM8631
General Description
EM8631 is a high performance, low startup
current, low cost, current mode PWM controller
with green mode power saving. The EM8631
integrates functions of Soft Start(SS), Under Voltage
Lockout(UVLO), Leading Edge Blanking(LEB),
internal Over Temperature Protection(OTP),
internal slope compensation. The EM8631 also
features more protection like Over Load
Protection(OLP) and Over Voltage Protection(OVP)
to prevent circuit damage occurred under
abnormal conditions.
The EM8631 provides the users a superior
AC/DC power application of high efficiency,
excellent EMI performance, low external
component counts and lower cost solution.
Features
Ultra Low Start Up Current (6uA)
Current Mode Control
Soft Start Function
Built-in Slope Compensation
Internal Leading-edge Blanking
UVLO
Over Voltage Protection (OVP) on VDD pin
Over Load Protection (OLP)
Cycle-by-cycle Current Limit
Feedback Open Protection
Internal Over Temperature Protection (OTP)
Constant Output Power Limit (Full AC Input
Range)
Excellent EMI performance
Ordering Information
Part Number
EM8631J
EM8631S
Package
SOT-23-6
DIP-8
Remark
Typical Application Circuit
Applications
Switching AC/DC Adaptor and charger
Open-Frame SMPS
2013/01/30
Rev.A.6
1
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Pin Configuration
EM8631
Pin Assignment
Pin Name
GND
COMP
RT
CS
VDD
GATE
NC
Pin Number
Pin Function
SOT236
1
2
3
4
5
6
--
DIP8
8
7
5
4
2
1
3&6
Ground.
Voltage feedback pin. By connecting a photo-coupler to close the control loop and
achieve the regulation.
Set the switching frequency by connecting a resistor to GND.
Senses the primary current.
IC Power Supply Pin.
Gate drive output to drive the external MOSFET.
No Internal Connection.
Function Block Diagram
VDD
Vbias
COMP
OTP
OLP
Green
mode
2R R
CS LEB
Slope
Comp
Soft start
OCP
Shutdown
Logic
OVP
28V
UVLO
15V / 9.8V
Oscillator
Max duty
-
+
PWM
comparator
SQ
R
-
+
+
OCP
comparator
GD
Soft
Driver
RT
GATE
2013/01/30
Rev.A.6
2
No Preview Available ! |
Absolute Maximum Ratings (Note1)
EM8631
Supply Input Voltage, VDD ----------------------------------------------------------------------- 30V
Gate pin------------------------------------------------------------------------------------------------ 30V
RT, COMP, CS Pin ----------------------------------------------------------------------------------- - 0.3V to 6.5V
Power Dissipation, PD @ TA = 25℃
SOT-23-6 ---------------------------------------------------------------------------------------------- 0.4W
DIP-8 ---------------------------------------------------------------------------------------------------- 0.714W
Package Thermal Resistance
SOT-23-6 --------------------------------------------------------------------------------------------- 250℃/W
DIP-8 --------------------------------------------------------------------------------------------------- 140℃/W
Junction Temperature ----------------------------------------------------------------------------- 150℃
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------- 260℃
Storage Temperature Range -------------------------------------------------------------------- -65℃ to 150℃
ESD Susceptibility (Note2)
HBM (Human Body Mode) ------------------------------------------------------------------------ 3KV
MM (Machine Mode) -------------------------------------------------------------------------------- 300V
Gate Output Current---------------------------------------------------------------------------------- 300mA
Recommended Operating Conditions (Note3)
Supply Input Voltage, VDD ----------------------------------------------------------------------- 11V to 26V
Operating Frequency ------------------------------------------------------------------------------ 50k to 130kHz
Junction Temperature Range--------------------------------------------------------------------- -40℃ to 125℃
Ambient Temperature Range-------------------------------------------------------------------- -40℃ to 85℃
Electrical Characteristics
(VDD=15V, RRT=100K ohm, TA=25℃, unless otherwise specified)
Parameter
Symbol
Test Conditions
VDD Section
VDD OVP Protect voltage
Start up current
VDD On Threshold Voltage
VOVP
ISTART1
ISTART2
VTH-ON
VDD=7V
VDD= VTH-ON-0.5V
VDD Off Threshold Voltage
Operating Supply Current 1
Operating Supply Current 2
Operating Supply Current 3
VTH-OFF
IDD-OP1
IDD-OP2
IDD-OP3
VDD=15V, VCOMP=0V,
VDD=15V, VCOMP=3V,
CGATE=1nF
VDD=15V,
Protection triggerred
2013/01/30
Rev.A.6
Min Typ Max Units
26.5 28 29.6 V
- 1 2 uA
- 6 12 uA
13.5 15 16.5 V
8.8 9.8 10.8 V
- 2 3 mA
- 2.5 - mA
- 0.4 - mA
3
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Номер в каталоге | Описание | Производители |
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