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PDF EM8563A Data sheet ( Hoja de datos )
| Número de pieza | EM8563A | |
| Descripción | PWM Converter | |
| Fabricantes | Excelliance MOS | |
| Logotipo |  |
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EM8563A
HV Start-up Green-mode PWM Convertor with Brown-Out Protection
General Description
EM8563A is a high performance, low cost, HV
Start-up, current mode PWM controller with green
mode power saving. The EM8563A integrates
functions of Soft Start (SS), Under Voltage Lockout
(UVLO), Leading Edge Blanking (LEB), internal Over
Temperature Protection (OTP), and internal slope
compensation. The EM8563A also features more
protection like Over Load Protection (OLP) and
Over Voltage Protection (OVP) to prevent circuit
damage occurred under abnormal conditions. The
EM8563A also has line under-voltage protection
(Brown-out Protection).
Features
700V High Voltage Start up Circuit
Current Mode Control
Soft Start Function
Built-in Slope Compensation
Internal Leading-edge Blanking
Brown in/out Protection
Over Voltage Protection (OVP) on VCC 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
EM8563AS7
Package
DIP-7
Remark
Typical Application Circuit 1
Applications
LCD Monitor Power Supply
Open-Frame SMPS
AC EMI
INPUT Filter
DC
OUTPUT
Typical application
DD
VCC
EM8563A
CS BNO GND COMP
2013/02/25
Rev.A3
1
1 page  
Electrical Characteristics
(VCC=16V, TA=25℃, unless otherwise specified)
Parameter
Symbol
Test Conditions
VCC Section
VCC OVP Protect voltage
Start up current
VCC On Threshold Voltage
VCC Off Threshold Voltage
Operating Supply Current 1
VOVP
ISTART
VTH-ON
VTH-OFF
ICC-OP1
VCC=VTH-ON-0.5V
VCC=15V, VCOMP=0V,
Operating Supply Current 2
ICC-OP2 VCC=15V, VCOMP=3V,
Operating Supply Current 3
ICC-OP3
D Section
HV Current Source
Drain to Source Breakdown voltage
Drain leakage current
ON-Resistance
Switching time
Current-Sense Section
TF
Maximum Internal Current
Setpoint
VCSLim
Leading Edge Blanking Time
Propagation Delay Time
Soft-Start Period
Internal Oscillator
TLEB
TPD
TSS
Oscillation Frequency
Jitter Percentage
fOSC
Jitter Period
Maximum Duty
Dmax
Green mode minimum frequency
Frequency variation vs. VCC
Frequency variation vs.
Temperature
COMP Section
COMP short to GND current
Open loop COMP voltage
COMP voltage to CS voltage
Attenuation
ICOMP
VCOMP
Av
VCC=15V,
Protection triggerred
VCC=VTH-ON-0.5V
VD=50V
VCC=VTH-ON+0.5V
VD=700V, PWM off
OCP at 36% Duty
OCP at Zero on-Duty
VCC=11V to 25V
-20℃ to 105℃(Note4)
VCOMP=0V
COMP pin open
Min
27
-
15
9
-
-
-
700
0.81
0.70
300
90
150
1 / 2.5
EM8563A
Typ Max Units
29 31 V
45 65 uA
16 17 V
10 11 V
0.7 2 mA
2.5 - mA
0.3 - mA
1 mA
V
300 uA
2.2 Ω
250 nS
0.9 0.99 V
0.78 0.86 V
380 460 nS
100 nS
3.5 mS
100 110 KHz
+/-4 %
2.6 mS
75 %
22 KHz
3%
3%
250 350 uA
5.2 V
1 / 3 1 / 3.5 V/V
2013/02/25
Rev.A3
5
5 Page 
Protection
The EM8563A provides many protection functions
that intend to protect system from being damaged.
All the protection functions are listed as below:
Cycle-by-cycle current limit
The EM8563A has over-current protection
thresholds. It is for cycle-by-cycle current limit,
which turns off MOSFET for the remainder of
the switching cycle when the sensing voltage of
MOSFET current reaches the threshold.
Over-load / Open-loop Protection (OLP)
When feedback loop is open, as shown in Fig. 18,
no current flows through the opto-coupler
transistor, the EM8563A pulls up the COMP pin
voltage to 5.2V.
When the COMP pin voltage is above 4.0V
longer than 56mS, OLP is triggered. This
protection is also triggered when the SMPS
output drops below the normal value longer
than 56mS due to the overload condition.
EM8563A
Over Voltage Protection (OVP) on VCC
The EM8563A are implemented an
Over-Voltage-Protection (OVP) on VCC.
Whenever the VCC voltage is high than the OVP
threshold voltage (29V), the output gate drive
will be shutdown to stop the switching of the
power MOSFET until the next UVLO (on).
The Over-Voltage-Protection on VCC function in
EM8563A is an auto-restart type protection. If
the OVP condition is not released, the VCC will
tripped the OVP level again and re-shutdown
the gate output. The VCC is working as a hiccup
mode as shown in Fig. 19. On the other hand, if
the OVP condition is removed, the VCC level will
go back to normal level and the output will
automatically return to the normal operation.
VCC
OVP level
UVLO(on)
UVLO(off)
Gate out
t
Fig. 18
No Switch out
Fig. 19
t
Internal Over-Temperature Protection (OTP)
Internal 150℃ comparator will provide over
temperature protection (OTP). OTP will not
shutdown system. It stops the system from
switching until the VCC is below the UVLO (off)
threshold voltage, the system will hiccup.
2013/02/25
Rev.A3
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EM8563A.PDF ] | |
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