GR8762
Power Factor Controller IC for High Power Factor
Features
LHDTHDprotections
Description
Low Startup Current
The GR8762 is a current-mode PFC controller
Low Quiescent Current
operating
Under-Voltage Lockout with Hysteresis
sinusoidal current is taken from the single phase line
Zero Current Detector for Critical Conduction
supply and stabilized DC voltage is available at the
Mode
output. The IC includes a highly liner multiplier
Dynamic
and
Static
Output
Over-Voltage
in
critical
conduction
mode.
The
which can reduce AC input current distortion, that
Protection
allows
wide-range-mains
operation
with
an
Gate Output Maximum Voltage Clamped
extremely low THD, even over a large load range.
Internal Restart Timer
The output voltage is controlled by an error amplifier
1% Internal Reference Voltage
and an internal voltage reference. An effective
Internal Leading-Edge Blanking
two-step (dynamic and static) OVP enables to safely
+/-500mA Totem Pole Output with Active Shut
handle over voltages either occurring at start-up or
Down
resulting from load disconnection. The totem-pole
output stage capable of ±500mA driving capability
is suitable for big MOSFET or IGBT. It is available in
Applications
both 8-pin DIP and 8-pin SOP package.
Power Supply PFC Pre-Regulator
LED Lighting Application
Desktop PC
Electronics Ballast for Fluorescent Lamp
Ordering and Marking Information
GR8762
Package Code
RoHS Code
J: DIP-8
K: SOP-8
G: Green (Halogen Free) Device
L: PB Free Device
DIP-8/SOP-8
GR8762
X X XXX
Serial No.
Code 1
Code 2
Code 1
Year
8
9
A
B
2008 2009 2010 2011
Code 2 1
Month Jan.
2
Feb.
3
Mar.
4
Apr.
●
●
●
G
H
I
J
2016
2017
2018
2019
9
Sep.
A
Oct.
B
Nov.
C
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.
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
GR8762
Pin Configuration
TOP VIEW
VSEN
1
8
VCC
COMP
2
7
DRV
MUL
3
6
GND
4
5
ZCD
CS
Pin Description
Pin
Symbol
Description
Voltage error amplifier Inverting Input. VSEN is connected via a resistive divider to
1
VSEN
the boost converter output, With a capacitor connected to COMP, The internal error
amplifier acts as an integrator.
Voltage error amplifier output. This is the first multiplier input. If the current flowing
2
COMP
into this pin is exceeding an internal threshold, the multiplier output voltage is
reduced to prevent the MOSFET from over-voltage damage.
3
MUL
Multiplier input, which is the second multiplier input and is connected via a resistive
divider to the rectifier output voltage.
Current sense input, which is connected to a sense resistor controlling the
4
CS
MOSFET source current .A leading edge blanking circuitry, suppresses voltage
spits when turning the MOSFET on.
5
ZCD
6
GND
7
DRV
Zero current detector input, which is connected to an auxiliary winding monitoring
the zero crossing of the inductor current.
Ground
Gate drive output, which is the output of a totem-pole circuitry for direct driving a
MOSFET.
Positive voltage supply. If VCC exceeds the UVLO (on) threshold, the IC is
8
VCC
switched on. When VCC falls below the UVLO (off) threshold, it is switched off and
power consumption is very low. VCC is internally clamped to 28V.
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
2
GR8762
Absolute Maximum Ratings
VCC supply + zener current ----------------------------------------------------------------------------------------------Voltage at Pin VSEN, MUL, CS, ZCD
------------------------------------------------------------------------
20mA
-0.3V~6.5V
Junction temperature -----------------------------------------------------------------------------------------------------Operating ambient temperature ----------------------------------------------------------------------------------Storage temperature range ------------------------------------------------------------------------------------
150℃
-20℃ ~ 85℃
-65℃ ~ 150℃
SOP-8 package thermal resistance ---------------------------------------------------------------------------------
160℃/W
DIP-8 package thermal resistance --------------------------------------------------------------------------------
100℃/W
Power dissipation (SOP-8, at ambient temperature = 85℃)
---------------------------------------------------
400mW
Power dissipation (DIP-8, at ambient temperature = 85℃)
--------------------------------------------------
650mW
Lead temperature (All Pb free packages, soldering, 10sec)
------------------------------------------------------
260℃
ESD voltage protection (Human body model) ----------------------------------------------------------------------------
2 KV
ESD voltage protection (Machine model)---------------------------------------------------------------------------------
200 V
Block Diagram
VCC
GND
ZCD
25V
+
9.5V
Internal
Supply
UVLO
12V
Reference
Voltage
Clamp
Current
5.7V
+
Detector
-
1.7V
0.2V
-
Enable
+
1.3V
Restart
Timer
Inhibit
time delay
2.25V
2.5V
Inhibit
+
+
Voltage
Amp
-
200ns
LEB
Current
Comp
+
1.7V
Multiplier
RS
Flip-Flop
Gate
Drive
DRV
15V
OVR
VSEN
COMP
MUL
CS
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
3
GR8762
Electrical Characteristics (Ta = 25℃, Vcc = 12V, CO=1nf, unless otherwise specified.)
Parameter
Test Conditions
Symbol
Min
Typ
Max
Unit
22
V
SUPPLY VOLTAGE
VCC
10.5
Zener Voltage
ICC+IZ=20mA
VZ
22
25
28
V
UVLO on Voltage
VCC-ON
11
12
13
V
UVLO off Voltage
VCC-OFF
8.5
9.5
10.5
V
VCC Hysteresis
VCC-HY
2.5
ICCL
40
70
uA
2.5
3.8
mA
3.5
5.0
mA
1.7
2.2
mA
2.5
2.535
V
2
5
mV
-1
uA
V
SUPPLY CURRENT
Startup Current
Quiescent Current 1
ICCH after turn on
Operating Supply Current
ICC
During OVP(either
Quiescent Current 2
static or dynamic or
Vinv≦150mV)
VOLTAGE ERROR AMPLIFIER
Voltage Feedback Input Theshold
VFB
Line Regulation
Vcc = 10.3V~22V
Input Bias Current
VINV=0 to 3V
Voltage Gain
Source Current
Sink Current
VFBLR
GV
Gain Bandwidth
2.465
60
GBW
VCOMP= 4V
VSEN=2.4V
VCOMP= 4V
VSEN=2.6V
80
dB
1
MHz
ICOMPsrc
-2
-3.5
-5
mA
ICOMPsnk
2.5
4.5
5.5
mA
Upper Clamp Voltage
ISOURCE= 0.5mA
VCOMP_H
4.5
5.0
5.5
V
Lower Clamp Voltage
ISINK= 0.5mA
VCOMP_L
2.0
2.2
2.4
V
VVFF= 0 to 4V
IMUL
-1
uA
MULTIPLIER INPUT
Input Bias Current
Dynamic Voltage Range of MUL
V
V
CS
MUL
K Gain
VMUL
VMUL=0 to 0.5V
3.0
1.65
VCOMP=Upper Clamp
VMUL=1V
V
1.9
V/V
0.6
1/V
30
uA
VCOMP=4V
OVER-VOLTAGE REGULATOR
Threshold Current
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
IOVR
4
GR8762
Hysteresis
20
Static OVP Threshold
2.15
uA
2.25
2.35
V
200
350
nS
1.7
1.8
V
CURRENT SENSE COMPARATOR
Delay to Output
TD(H-L)
Current Sense Reference Clamp
VCOMP= Upper Clamp
Current Sense Offset
VMUL= 0
Leading Edge Blanking
1.6
VCSoffset
30
mV
TLEB
200
nS
ZERO CURRENT DETECTOR
Upper Clamp Voltage
IZCD= 2.5mA
5.0
5.7
6.5
V
Lower Clamp Voltage
IZCD= -2.5mA
0.3
0.65
1.0
V
Upper Threshold Voltage Arming
Voltage (positive-going edge)
Lower
Threshold
Voltage Arming
(positive-going
edge)
Voltage (negative-going edge)
VZCDA
1.7
V
VZCDT
1.3
V
(negative-going
edge)
Source
Current Capability
IZCD_src
-2.5
Sink Current Capability
IZCD_sink
2.5
Disable Threshold
VZCD_DIS
150
Restart Threshold
VZCD_EN
250
Restart Current after Disable
-5.5
mA
mA
200
250
mV
350
mV
30
75
uA
75
190
300
uS
IGD source = 20mA
2.0
2.6
V
IGD source = 200mA
5.5
6.5
V
IGD sink=200mA
1.3
2.0
V
RESTART TIMER
Restart Time
TRES
GATE DRIVER
Dropout voltage
Rising Time
Load=1nF
TRISE
40
80
nS
Falling Time
Load=1nF
TFALL
30
70
nS
12
15
V
3.5
V
Clamp
UVLO Saturation
VCLAMP
VCC = 0 to VCC
Isink=2mA
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
10
5
GR8762
Typical Performance Characteristics
13.0
UVLO(on) & UVLO(off) (V)
Startup Current(uA)
40.0
35.0
30.0
25.0
Fig. 5
12.0
11.0
10.0
20.0
9.0
-40
0
40
80
120
-40
0
40
Temp.(℃)
Fig. 1
120
Fig. 2
2.50
32.0
2.00
30.0
VCC Zener Clamp(V)
Operating Current(mA)
80
Temp.(℃)
1.50
1.00
0.50
28.0
26.0
24.0
-40
0
40
80
120
-40
0
Tempe.(℃)
40
80
120
Temp.(℃)
Fig. 3
Fig. 4
240
2.60
220
Restart Time(us)
Vref(V)
2.55
2.50
2.45
200
180
160
140
2.40
-40
0
40
80
120
Temp.(℃)
Fig. 5
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
-40
0
40
80
120
Temp.(℃)
Fig. 6
6
Typical Performance Characteristics
(Cont.)
400
130
120
Shut Down Delay(ns)
LEB Time(ns)
350
300
250
110
100
90
200
80
-40
0
40
Fig. 7
80
120
-40
0
40
Tempe.(℃)
Tempe.(℃)
Fig. 7
Fig. 8
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
80
120
7
Application Information
Overview
The GR8762 contains an one quadrant multiplier
with a wide linear operating range, a voltage
amplifier used in a feedback loop, an overvoltage
regulator, a current sense comparator, a zero
current detector, a PWM and logic circuit, a totem
pole MOSFET driver, an internal voltage reference,
a restart timer and under voltage lockout circuit.
Because of the integrator’s low bandwidth fast
changes of the output voltage can’t be regulated
within an adequate time. Fast output changes occur
during initial start-up, sudden load removal. While
the integrator’s differential input voltage remains
zero.
During this fast changes, a peak current is flowing
through the external capacitor into pin COMP. If this
Multiplier
The one quadrant multiplier has two inputs M1 and
M2. The input M1 (MUL Pin) provides the
information of the waveform of the input voltage.
current exceeds an internal defined margin the
overvoltage regulator circuit reduces the multiplier
output voltage. As a result the on time of the
MOSFET is reduced.
Its range is from 0 to 3.5V being referenced to
ground. The input M2 (COMP Pin) is the voltage
amplifier output, which provides the information of
the DC output voltage. Both inputs are designed to
achieve good linearity over a wide dynamic range to
represent an AC line free from distortion.
Current Sense Comparator
An external sense resistor transfers the source
current of the MOSFET into a sense voltage. The
multiplier output is compared with this sense
voltage. The switch-on peak current of the MOSFET
is blanked out via a leading edge blanking circuit
Voltage Error Amplifier
with a blanking time of typically 300nS.
With an external capacitor between the pins VSEN
and COMP the voltage error amplifier forms an
integrator. The integrator monitors the average
output voltage over several line cycles. Typically the
integrator’s bandwidth is set below 20Hz in order to
suppress the 100Hz ripple of the rectified line
voltage. The non-inverting input is biased internally
at 2.5V. The output is directly connected to the
multiplier input.
The gate drive is disabled when VSEN voltage is
less than 0.18V or COMP voltage is less than 2.2V.
Zero Current Detector
The zero current detector senses the inductor
current via an auxiliary winding and ensures that the
next on-time of the MOSFET is initiated immediately
when the inductor current has reached zero. This
diminishes the reverse recovery losses of the boost
converter diode. The MOSFET is switched off when
the voltage drop of the sense resistor reaches the
voltage level of the multiplier output. So the boost
current waveform has a triangular shape and there
are no dead-time gaps between the cycles. This
Overvoltage Regulator
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
leads to a continuous AC line current limiting the
8
peak current to twice of the average current.
130us after the inductor current reaches zero.
To prevent false tripping, the zero current detector is
designed as a Schmitt-Trigger with a hysteresis of
Under-Voltage Lockout
0.5V. An internal 5.7V clamp protects the input from
An under voltage lockout circuit switches the IC on
overvoltage breakdown. An external resistor has to
when VCC reaches the UVLO(ON) threshold and
be used in series with the auxiliary winding to limit
switches the IC off when VCC is falling below the
the current through the clamps.
UVLO(OFF) threshold. During start up the supply
current is less than 40uA. An internal voltage clamp
Restart Timer
has been added to protect the IC from VCC
The restart timer function eliminates the need of a
overvoltage.
oscillator. The timer starts or restarts the GR8762
when the drive output has been off for more than
Typical Application Circuit
Pre-regulator Application
GR8762
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
9
BOM List
No.
Part
Description
Q’ty.
1
BD1
PBL405 4A 600V
1
2
CN1, CN2
2/3 pin 3.96 180°,white
1
3
C1
474K 400V Pitch=15mm
1
4
C2
47uF 35V 6*12mm 105℃
1
5
C3
0805 104K 50V
1
6
C4
103K 100V
7
C5, C6
0805 103K 50V
X7R
2
8
C7
0805 225K 50V
X7R
1
9
C8
47uF/450V 22*26(max) 105℃
1
10
C9
NC
1
11
CX1
474K/275V
1
12
CR1
FR104 1A 400V
1
13
CR2
ER506 5A/800V DO-201
1
14
CR3
LL4148 DO-80
1
15
F1
4*8mm T3.15A/250V, fuse
1
16
HS1
15*10.5*25mm heat sink, Aluminum
1
17
LF1
T12*10*8c 0.7mH
1
18
LF2
T16*12*8c
1
19
NTC1
SCK2R55A
1
20
Q1
2SK2842 12A/500V TO-220
1
21
R1, R2, R3, R4
1206
22
R5
20K
23
X7R
X7R
1
15mH
1M
5%
4
0805
5%
1
R6, R7
1206 240K
5%
2
24
R8
100R 1206
5%
1
25
R9
39K
1206
5%
1
26
R10
33R
1206
5%
1
27
R11
0R
1206
5%
1
28
R12
100K 0805
5%
1
29
R13
4.7K 0805
5%
1
30
R14
0R
5%
1
31
R15
0.27R 2WS 5%
1
32
R16
NC
0
0805
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
10
BOM List (Cont.)
No.
Part
Description
Q’ty.
33
R17, R18
330K 1206
1%
2
34
R19
4.3K 0805
1%
1
35
R20
91K
36
T1
PQ2620 0.7mH
1
37
U1
SOP-8 GR8762
1
38
Z1
18V 1W
1
39
PCB
CEM-1 2oz 1mm 110*56mm
1
0805
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1%
1
11
D
C
B
1
T1B
3rd Layer
0.15*36Ts
N
4
3
90~264VAC
L
68K
R13
0R
R2
L2
UU9.8
C5
47u/50V
CX1
0.1u
BAV103
D3
F1
2A/250V
ZD3
16V
R23
5.1K
2
C11
12N
Q2
2N2222
BD1
1A/600V
R24
10K
U2B
PC817
R30
3K
R21
24K
C8
100u/25V
C3
0.1u/400V
DR8*10
L1
5
3
C12
12N
R9
1M
R12
1M
ZCD
GND
U1
GR8762
MULT
GD
CS
3
FB
COMP
R10
150K
R3
150K
VCC
8
6
R25
100K
1
2
7
4
R6
200K
C9
1u
NC
R20
R5
200K
C13
NC
C10
470P
R17
510R
R15
10R
2200P/1KV
C4
R22
1.1R/1W
R11
10K
2A/600V
Q1
D4
1N4007
1st Layer
0.2*132Ts
1.15mH
2
1
T1A
EE-16V 8PIN
4
R19
5.1K
7
12V
ZD2
R14
0R
Q3
2N2222
C6
0.1u
R27
5.1K
R1
47R
CY1
1KP
D1
ER304
2nd Layer
0.3 Triple*48Ts
8
C1
470P/500V
5
4
VCTRL
OUT
1K
R16
U3
TSM1052
VSENSE
ICTRL
C2
220u/35V
ZD1
0R
6
VCC
GND
2
A
5
1
3
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
Date:
File:
B
Size
Title
C14
0.47u
R28
15K
R29
1K
R18
2K
R26
2K
C15
0.1u
R4
40.2K
GND
6
2011/3/14
Sheet of
C:\Documents and Settings\..\Single stage using Drawn
GR8763.Sch
By :
Number
U2A
PC817
R8
1R2
R7
1R2
D2
US1M
VOUT
22V/0.33A
Revision
LED Lighting Application
12
D
C
B
A
Package Information
DIP-8
SYMBOL
MILLIMETERS
MIN.
INCHES
MAX.
A
MIN.
MAX.
5.33
0.210
A1
0.38
0.015
A2
2.92
4.95
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
8.26
0.300
0.325
E1
6.10
7.11
0.240
0.280
0.005
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.
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
13
Package Information
SOP-8
SYMBOL
INCHES
MILLIMETERS
MIN.
MAX.
A
MIN.
MAX.
1.75
A1
0.10
A2
1.25
b
0.31
0.51
0.012
0.020
c
0.17
0.25
0.007
0.010
D
4.80
5.00
0.189
0.197
E
5.80
6.20
0.228
0.244
E1
3.80
4.00
0.150
0.157
e
0.25
0.069
0.004
0.010
0.049
1.27 BSC
0.050 BSC
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
θ
o
0
o
8
o
0
o
8
Note: 1. Followed from JEDEC MS-012 AA.
2. Dimension “D” does not include mold flash, protrusions or gate burrs. Mold flash, protrusion or gate
burrs shall not exceed 6 mil per side.
3. Dimension “E1” does not include inter-lead flash or protrusions. Inter-lead flash and protrusions shall
not exceed 10 mil per side.
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
14
Carrier Tape & Reel Dimensions
Application
A
H
330.0±2.0
50 MIN.
P0
P1
P2
D0
D1
4.0±0.10
8.0±0.10
2.0±0.05
1.5+0.10
-0.00
1.5 MIN.
SOP-8
T1
C
d
12.4+2.00 13.0+0.50
-0.00
-0.20
D
1.5 MIN.
W
E1
20.2 MIN. 12.0±0.30 1.75±0.10
T
A0
B0
F
5.5±0.05
K0
0.6+0.00
-0.40 6.40±0.20 5.20±0.20 2.10±0.20
(mm)
Devices Per Unit
Application
Carrier Width
Cover Tape Width
Devices Per Reel
SOP- 8
12
-
2500
2012.04 Ver.1. 0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
15
Taping Direction Information
SOP-8
Direction of feed
Direction of feed
________________________________________________________________________
Grenergy OPTO, Inc. reserves the right to make corrections, modifications, enhancements, improvements, and other changes
to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the
latest relevant information before placing orders and should verify that such information is current and complete.
2012.04 Ver.1.0 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
16
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