GR8830
Green-Mode PWM Controller below 100mW Standby Power
Features
Description
Current mode PWM control
The GR8830 is a highly-integrated, low startup
Standby power below 100mW solution
current, current mode PWM controller with
Under voltage lockout (UVLO)
Green-mode function. This function enables the
Non-audible-noise green-mode control
power supply to easily meet even the strictest
Programmable switching frequency
power conservation requirements. The integrated
Internal leading-edge blanking
functions also include the leading-edge blanking
Internal slope compensation
of
Internal soft start
compensation,
Gate output voltage clamp
limiting, and soft start. OLP, OCP and OVP
Jitter and soft driving for reducing EMI
provide protection performance for fault conditions.
Over-voltage protection (OVP) on VCC pin
For protecting the external power MOSFET from
Over-load protection (OLP)
being damaged by supply over voltage, the
Over-current protection (OCP) on CS pin
GR8830 OUT pin voltage is clamped to about
the
current
sensing,
cycle-by-cycle
internal
peak
slope
current
13V.
The GR8830 improves the performance and
Applications
reduces the cost of power supplies. It is with both
Switching AC/DC power adaptor
DIP-8 and SOT-26 package.
Battery charger
Open-frame SMPS
Ordering and Marking Information
GR8830
Package Code
RoHS Code
G: Green (Halogen Free) Device
L: PB Free Device
J: DIP-8
C: SOT-26
DIP-8
SOT-26
GR8830
X X XXX
Code 1
30 X X
XXX
Code 2
Serial No.
Code 1
Serial No.
Code 2
Code 1
8
9
A
B
Year 2008 2009 2010 2011
Code 2
1
2
3
4
Month
Jan.
Feb.
Mar.
Apr.
G
2016
●
●
●
H
2017
I
2018
J
2019
9
A
B
C
Sep.
Oct.
Nov.
Dec.
Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
GR8830
Pin Configuration
Pin Description
Pin No.
Name
Function
1
GND
2
COMP
3
RT
Connecting a resistor to ground to set the switching frequency
4
CS
Current sense pin, connect to sense the MOSFET current
5
VCC
Power Supply pin
6
OUT
The output driver for driving the external MOSFET
Ground
Voltage feedback pin, by connecting a photo-coupler to control the duty cycle
Note: Pin No. is only for SOT-26 package, DIP-8 see Pin Configuration.
Absolute Maximum Ratings
Supply voltage VCC
COMP, RT, CS
OUT
---------------------------------------------------------------------------------------------------------
30V
-------------------------------------------------------------------------------------------------------- －0.3 ~ 7V
------------------------------------------------------------------------------------------------------------
Junction temperature
－0.3 ~ Vcc+0.3V
----------------------------------------------------------------------------------------------------
Operating ambient temperature
Storage temperature range
-----------------------------------------------------------------------------
-------------------------------------------------------------------------------
SOT-26 package thermal resistance
－20℃ ~ 85℃
－65℃ ~ 150 ℃
----------------------------------------------------------------------------
Power dissipation (SOT-26, at ambient temperature = 85℃)
Power dissipation (DIP-8, at ambient temperature = 85℃)
Lead temperature (All Pb free packages, soldering, 10 sec)
ESD voltage protection, human body model
ESD voltage protection, machine model
150℃
250℃/W
------------------------------------------------
250mW
---------------------------------------------------
650mW
--------------------------------------------------
260℃
-------------------------------------------------------------------------
----------------------------------------------------------------------------
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
2KV
200V
2
GR8830
Recommended Operating Conditions
Item
Min.
Max.
Unit
Supply voltage VCC
12
25
V
Switching frequency
50
130
KHz
Block Diagram
VCC
VCC
UVLO
Internal Bias & Vref
10.8V/6.8V
+
27V
3.5V
EN
debounce
+
Vref OK
VCC OK
OVP
All Blocks
OLP
60ms delay
-
Latch
EN
Protection
RB
+
0.95V
CS
LEB
-
CS open, 2ndary rectify diode short
+
0.9V
OCP
-
Slope compensation
Protection
Vbias
Soft Start
+
-
R Q
RT_F
EN
Driver
stage
OUT
S
COMP
Mode
select
OSC
RT
RT
open/short
RT_F
GND
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
3
GR8830
Electrical Characteristics (VCC = 15.0V and TA = +25℃,unless otherwise specified)
Parameter
Pin
Min.
Typ.
Max.
Unit
15
uA
SUPPLY VOLTAGE
Startup current
5
8
Operating current (with 1nF load on OUT pin), Vcomp = 0V
5
1.5
mA
Operating current (with 1nF load on OUT pin), Vcomp = 2.5V
5
2.5
mA
5
0.6
mA
UVLO (off)
5
6.8
V
UVLO (on)
5
10.8
V
OVP level on VCC pin
5
Operating current (with 1nF load on OUT pin), protection tripped
(OLP, OVP)
26
27
28
V
5
V
VOLTAGE FEEDBACK
Open loop voltage, COMP pin open
2
Green-mode threshold voltage
2
1.8
V
CURRENT SENSING
Maximum input voltage, Vcs (off)
4
0.85
Minimum input voltage at 0% duty, Vcs (off)
Leading-edge blanking time
4
Input impedance
4
Delay to output
4
0.9
0.95
V
0.6
V
350
nS
1
MΩ
100
nS
OSCILLATOR
Frequency (RT = 100KΩ)
3
Jitter frequency
3
Green mode frequency (RT = 100KΩ)
3
Temp. stability (－40°C ~ 110°C)
Voltage stability (Vcc = 11V ~ 25V)
60
65
70
±6
20
KHz
%
25
KHz
3
3
%
3
1
%
Output low level, VCC = 15V, Io = 10mA
6
1
V
Output high level, VCC = 15V, Io = 10mA
6
Rising time, load capacitance = 1000pF
6
200
nS
Falling time, load capacitance = 1000pF
6
80
nS
VGATE-clamp (at VCC = 20V )
6
GATE DRIVER OUTPUT
8
12
V
13
14
V
OLP
OLP trip level, Vcomp (OLP)
-
3.5
V
OLP delay time (note), Fs = 65KHz
-
60
mS
PWM Section
Maximum duty cycle
-
70
75
80
%
-
130
160
190
℃
OTP
OTP trip level
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
4
GR8830
Typical Performance Characteristics
2.2
10.0
Operating current (mA)
VDD Start up current (uA)
12.0
8.0
6.0
4.0
2.0
-40
0
40
80
1.8
1.6
1.4
1.2
120 125
0
40
80
120 125
Temperature (℃ )
Fig. 1 VDD Start up current vs. Temperature
Fig. 2 Operating current vs. Temperature
Minimum Input Voltage of CS pin(V)
3.8
3.6
3.4
3.2
3.0
-40
0
40
120 125
80
Temperature (℃ )
Fig. 3 OLP Trip
- Level vs. Temperature
0.61
0.60
0.59
0.58
0.57
-40
0
40
Temperature (℃ )
80
120 125
Green Mode Frequency (KHz)
RT=100Kohm
25
67
24
23
66
22
65
64
63
-40
0.62
Fig. 4 Minimum Input Voltage of CS pin vs. Temperature
68
Frequency (KHz)RT=100Kohm
-40
Temperature (℃ )
4.0
OLP-Trip Level (V)
2.0
0
40
80
120 125
Temperature (℃ )
Fig. 5 Frequency vs. Temperature
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
21
20
-40
0
40
Temperature (℃ )
80
120 125
Fig. 6 Green Mode Frequency vs. Temperature
5
GR8830
Application Information
Start-up Current
The typical start-up current is around 8uA. Very low
start-up current allows the PWM controller to
increase the value of start-up resistor and then
reduce the power dissipation on it.
Where R is the resistor connected at RT pin.
100Kohm resistor results in 65KHz switching
frequency.
Under-voltage Lockout (UVLO)
A
The recommended range of oscillation
frequency is 50 KHz~130 KHz.
A hysteresis UVLO comparator is implemented in
GR8830, once the VCC rises above UVLO (on)
voltage, the controller starts to switch with a soft
start period. It will continue to operate unless the
voltage drops below UVLO (off) voltage. It’s
operation is shown in Fig. 7
Green-Mode Operation
When the load decreases to an extent, the
frequency of the controller will decrease so as to
reduce
the
system
power
consumption.
The
minimum frequency is about 21 KHz, which is
outside the audio range.
Leading-edge Blanking (LEB)
Vcc
Each time the power MOSFET is switched on, a
turn-on spike will inevitably occur at the sense
UVLO (on)
resistor. To avoid fault trigger, a 350ns leading-edge
blanking time is built in. Conventional RC filtering
UVLO (off)
can therefore be omitted. During this blanking
period, the current-limit comparator is disabled and
Fig. 7
Internal Slope Compensation
Soft Start
During initial power on, the GR8830 provides soft
start function.
can not switch off the gate driver.
It effectively suppresses the start up
peak current to reduce the power MOSFET drain
voltage especially at high line.
A built-in slope compensation circuit is constructed
in GR8830. When the switch is on, a ramp voltage is
added to the sensed voltage across the CS pin,
which helps to stabilize the system and prevent
sub-harmonic oscillations.
Oscillator
The maximum duty-cycle of internal oscillator is
limited about 75%
saturation.
to avoid the transformer
The frequency of the oscillator is
decided by an external resistor connected from RT
pin to ground.
fosc= 6500KHz/R (Kohm)
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
6
GR8830
UVLO on. The GR8830 is working in a hiccup mode
as shown in Fig. 9.
Application Information (Cont.)
Over-load Protection (OLP)
The controller has over load protection function.
An internal circuit detects the load level, when the
load is larger than a threshold and the condition
lasts more than 60ms, the gate output will keep low
VCC
OVP Tripped
OVP Level
UVLO(on)
UVLO(off)
t
level. Then VCC decreases below UVLO off level,
OUT
the controller resets again. Fig. 8 shows the
waveform of the OLP operation.
Non-Switching
Switching
Switching
t
VCC
Fig. 9
UVLO(on)
Gate Clamp/Soft Driving
UVLO(off)
OLP
Driver is clamped to 13V by an internal clamping
( off )
OLP Counter Reset
t
circuit.
COMP
OLP delay time
Those
damages
usually
come
from
undesired over-voltage gate signals. Under the
conditions listed below, the gate output will turn off
3.5 V
OLP trip Level
t
immediately to protect the power circuit. The
GR8830 also has soft driving function to minimize
OUT
EMI.
Switching
Non - Switching
Switching
VCC Mode Operation
t
In order to avoid the output voltage shut down by
Fig. 8
load changing from full to no load, the GR8830 is
built-in the VCC mode function. When the load from
Over-voltage Protection (OVP) on VCC
full changes to no load, the output voltage will
To prevent power MOSFET from being damaged,
overshoot and pull low the COMP pin by feedback
the GR8830 is implemented an OVP function on
loop. Thus the duty will disappear and no power
VCC. When the VCC voltage is higher than the OVP
delivers to the secondary. If there is without any
threshold voltage, the output gate driver circuit will
mechanism to prevent this situation, the VCC pin
be shut down immediately to stop the switching of
voltage will down to UVLO off and the IC will re-start
power MOSFET. The VCC OVP function is an
again. In the GR8830, before the VCC is down to
auto-recovery type protection. If OVP happens, the
UVLO off, it will force the OUT pin outputs the
pulses will be stopped and recover at the next
specified duty to pull the VCC higher than UVLO off.
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
7
GR8830
The operation is shown in Fig.10.
Application Information (Cont.)
VCC
The VCC mode function is used to prevent the
VCC mode
Burst mode
output re-start again when load changes. So never
VCC mode(off)
VCC mode(on)
UVLO(off)
let the system operate on the VCC mode at no load.
t
LOAD
The system should operate on burst mode,
otherwise the input power maybe become larger.
Full load
t
OUT
Switching
t
Fig. 10
Typical Application Circuit
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
8
A
B
C
N
L
F1
2A/250V
T1B
1
5 OHM/3A
NTC 1
10R
R6
t
D
FR1 03
D2
NC
R2
NC
R1
C2
10u/50V
CX 1
0.1u
L1
UU 9.8
NC
Z1
R2B
1M
R2A
1M
2
1N4 007
D1A ~D
2
IC2B
EL8 17
C13
0.01u
C1
33u/400V
RT
91K
3
2
RT
CO MP
5
IC1
GR 8830
VC C
GND
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
1
3
CS
OU T
3
4
6
CS
100P
R7
27R
RS
100R
R4B
51K
R4A
51K
D3
1N4 007
2200P /1K V
C4
4
RS 1//RS 2
2.4R//1.5R
Q1
2A/600V
T1A
EI22
1KP
CY 1
R51 A,B
22R //22R
D51
5A/40V
C51
2200P /1K V
4
C52
1000u /25V
5
Date:
File:
B
Size
Title
C55
0.1u
R53
2.8K
R55
0
R52
10.7K
1 5 -Oct-2 0 0 9
D:\G R8 8 3 6 \LD 7 5 3 2 -SCH .d d b
R54
250R
C54
470u/25V
ZD5 1
NC
Nu mb er
IC51
KA 431AZ
IC2A
EL8 17
R56
NC
L51
R3* 15 :0.7* 15Ts
5
6
Sh eet o f
Drawn By :
Rev is io n
GN D
VO UT
12V /1.5A
6
A
B
C
D
GR8830
9
GR8830
Package Information
SOT-26
SYMBOL
MILLIMETERS
MIN.
INCHES
MAX.
A
MIN.
MAX.
1.45
0.057
A1
0.00
0.15
0.000
0.006
A2
0.90
1.30
0.035
0.051
b
0.30
0.50
0.012
0.020
c
0.08
0.22
0.003
0.009
D
2.70
3.10
0.106
0.122
E
2.60
3.00
0.102
0.118
E1
1.40
1.80
0.055
0.071
e
0.95 BSC
0.037 BSC
e1
1.90 BSC
0.075 BSC
L
θ
0.30
o
0
0.60
8
o
0.012
o
0
0.024
8
o
Note: 1. Followed from JEDEC TO-178 AB.
2. Dimension D and E1 do not include mold flash, protrusions or gate burrs. Mold flash, protrusions or
gate burrs shall not exceed 10 mil per side.
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
10
GR8830
Package Information
DIP-8
SYMBOL
MILLIMETERS
MIN.
INCHES
MAX.
A
MIN.
MAX.
5.33
0.210
A1
0.38
A2
2.92
4.95
0.015
0.115
0.195
b
0.36
0.56
0.014
0.022
b2
1.14
1.78
0.045
0.070
c
0.20
0.35
0.008
0.014
D
9.01
10.16
0.355
0.400
D1
0.13
E
7.62
E1
6.10
0.005
8.26
0.300
7.11
0.240
0.325
0.280
e
2.54 BSC
0.100 BSC
eA
7.62 BSC
0.300 BSC
eB
L
10.92
2.92
3.81
0.430
0.115
0.150
Note: 1. Followed from JEDEC MS-001 BA.
2. Dimension D, D1 and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not
exceed 10 mil.
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
GR8830
Carrier Tape & Reel Dimensions
SOT-26
Application
A
H
178.0±2.00
50 MIN.
P0
P1
P2
D0
D1
4.0±0.10
4.0±0.10
2.0±0.05
1.5+0.10
-0.00
1.0 MIN.
SOT-26
T1
C
d
8.4+2.00 13.0+0.50
-0.00
-0.20
D
1.5 MIN.
W
E1
20.2 MIN. 8.0±0.30 1.75±0.10
T
A0
B0
F
3.5±0.05
K0
0.6+0.00
3.20±0.20 3.10±0.20 1.50±0.20
-0.40
(mm)
Application
SOT -26
Carrier Width
Cover Tape Width
Devices Per Reel
8
5.3
3000
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
12
GR8830
Taping direction information
SOT-26
Direction of feed
AAA
AA
AAA
AA
AAA
AA
AAA
AA
AAA
AA
AAA
AA
AAA
AA
AX
AX
AX
AX
AX
AX
AX
Direction of feed
_______________________________________________________________________
2012.03 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
13
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