Rev 0.2
DIO8804
Single Stage Buck PFC Regulator for LED Lighting
Features
Internal 600V Power MOSFET
Valley turn-on of the MOSFET to achieve low
switching losses
0.3V current sense reference voltage leads to
a lower sense resistance thus a lower
conduction loss
Low start up current: 15μA typical
Reliable short LED and Open LED protection
Power factor >0.9
Compact package: SOIC-8
The DIO8804 drives the Buck converter in the
quasi-resonant mode to achieve higher efficiency
and keeps the Buck converter inconstant on time
operation to achieve high power factor.
Descriptions
The DIO8804 consists of an integrated single
stage Buck & PFC Regulator and 600V power
MOSFET,
specifically
designed
for
a
high
performance non-isolated converter with minimal
external components targeting at LED lighting
applications.
Applications
Tube lamp & PAR lamp
Down light & Bulb lamp
This chip adopts special design to achieve
reliable protection for safety requirement.
Block Diagram
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© 2017 DIOO MICROCIRCUITS CO., LTD
DIO8804• Rev. 0.2
DIO8804
Single Stage Buck PFC Regulator For LED Lighting
Ordering Information
Order Part Number
DIO8804CS8
Top Marking
DIO8804
Green
T
A
-40 to +125°C
SOIC-8
Package
Tape & Reel, 2500
Pin Assignments
CS
1
8
ZCS
NC
2
7
COMP
DIO8804
Drain
3
6
GND
Drain
4
5
VIN
SOIC-8
Figure 2 Pin Assignment (Top View)
Pin Definitions
Pin Name
Description
Current sense pin. Connect this pin to the source of the primary switch. Connect the sense resistor
across the source of the primary switch and the GND pin.
CS
(current sense resister Resistor:
R
S
=
1
V
ref
×
)
2
I
out
Also this pin used to detect transformer and secondary is short or not.
NC
Drain
VIN
GND
COMP
Not Connect.
Power MOSFET Drain Pin. The Drain pin is connected to the primary lead of the transformer.
Power supply pin. This pin also provides output over voltage protection along with ZCS pin.
Ground pin
Loop compensation pin. Connect a RC network across this pin and ground to stabilize the control
loop.
Inductor current zero-crossing detection pin. This pin receives the auxiliary winding voltage by a
resister divider and detects the inductor current zero crossing point. This pin also provides over
ZCS
voltage protection and line regulation modification function simultaneously. If the voltage on this pin
is above V
ZCS,OVP
, the IC would enter overvoltage protection mode. Good line regulation can be
achieved by adjusting the upper resistor of the divider.
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© 2017 DIOO MICROCIRCUITS CO., LTD
DIO8804• Rev. 0.2
DIO8804
Single Stage Buck PFC Regulator For LED Lighting
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. These are stress
ratings only and functional operation of the device at these or any other condition beyond those indicated in the operational sections
of the specifications is not implied. Exposure to absolute maxim rating conditions for extended periods may affect device reliability.
Parameter
VIN
Drain
Supply Current I
VIN
ZCS
CS, COMP
Power Dissipation, P
D
@ T
A
= 25°C, SOIC-8
Package Thermal Resistance,
SOIC-8
Storage Temperature Range
Junction Temperature Range
Lead Temperature Range
HBM, JEDEC: JESD22-A114
ESD
MM, JEDEC: JESD22-A115
Ө
JA
Ө
JC
Rating
-0.3 to 19
600
15
-0.3 to VIN+0.3
-0.3 to 5
1.1
100
Unit
V
V
mA
V
V
W
°C/W
50
-65 to 150
150
260
2000
V
200
°C
°C
°C
Recommend Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended Operating
conditions are specified to ensure optimal performance to the datasheet specifications. DIOO does not Recommend exceeding
them or designing to Absolute Maximum Ratings.
Parameter
Supply Voltage
Ambient Temperature Range
Rating
9.5 to 15.4
-40 to 125
Unit
V
°C
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© 2017 DIOO MICROCIRCUITS CO., LTD
DIO8804• Rev. 0.2
DIO8804
Single Stage Buck PFC Regulator For LED Lighting
Electrical Characteristics
V
IN
= 12V, T
A
= 25°C, unless otherwise specified.
Symbol
V
VIN,ON
V
VIN,OFF
V
VIN,OVP
I
ST
I
VIN_OVP
I
Q
I
VIN
.
Parameter
VIN turn-on threshold
VIN turn-off threshold
VIN OVP voltage
Start up Current
Shunt current in OVP mode
Quiescent Current
Operation current
Test Conditions
Min
Typ
16
7.3
17.8
Max
Unit
V
V
V
µA
mA
mA
mA
V
VIN
< V
IN,OFF
After V
VIN
>V
VIN,OVP,
then
set VIN=15V
No switching
C
L
=100pF,f=15kHz
15
2
0.26
0.36
Error Amplifier Section
V
REF
ZCS pin Section
V
ZCS
，
OVP
V
FAST_ST
ZCS pin OVP voltage threshold
Fast start up threshold
1.5
0.55
V
V
Internal reference voltage
0.294
0.3
0.306
V
Current Sense Section(Source PIN of integrated MOSFET)
V
CS.LMT
K
2
R
K2
PWM Section
T
ON.MAX
T
LEB
T
OFF,MAX
T
LEB.ZCD
f
MAX
Max on time
Leading edge blanking time
Max OFF time
ZCD Blanking Time
Maximum switching frequency
After turn off
COMP high clamp
16
350
68
2
115
µs
ns
µs
µs
kHz
Current limit reference voltage
CC Feed forward coefficient
CC Feed forward resistor R
K2
0.75
0.1
1020
Ω
V
Power MOSFET Section
V
BVDSS
I
DSS
Thermal Section
T
SD
Thermal Shutdown Temperature
150
°C
Break-down Voltage
Off-state drain current
I
DS
=250µA, T
J
=25℃
V
DS
=600V, V
GS
=0V,
T
J
=25°C
600
630
1
V
µA
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© 2017 DIOO MICROCIRCUITS CO., LTD
DIO8804• Rev. 0.2
DIO8804
Single Stage Buck PFC Regulator For LED Lighting
Typical Application
Figure 3 Typical Application
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© 2017 DIOO MICROCIRCUITS CO., LTD
DIO8804• Rev. 0.2
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