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PDF GR8210 Data sheet ( Hoja de datos )
| Número de pieza | GR8210 | |
| Descripción | Dimming Universal High Brightness LED Driver | |
| Fabricantes | Grenergy | |
| Logotipo |  |
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Preliminary GR8210
Dimming Universal High Brightness LED Driver
Features
Input voltage range from 5V to 450V
Cascode topology for lower switching loss and
surge voltage
Constant off time control
Line compensation of output current
Enable pin
Switch/PWM/Linear/SOTP dimming function
Leading-edge blanking
Frequency modulation in short circuit
protection and low output voltage condition
Over-temperature protection
Over-current protection
SOP-8 package, with few external components
needed
Application
DC/DC or AC/DC LED driver application
LED T Bar lighting
Cabin light in car
Both non-isolation and isolation lighting in high
input voltage
Ordering and Marking Information
General Description
The GR8210 is a high brightness LED driver with
the cascode topology that patented by Grenergy. A
high voltage power NMOSFET, BVDSS is 600V, as
the high side device and the power NMOSFET
inside the GR8210 as the low side device in this
cascode topology. A Zener voltage, was generated
by ST pin of the GR8210, turn on the high side
device all the time by connected to the gate terminal
of the high side device. The source terminal and the
drain terminal of the high side device are connected
to the DRN pin of the GR8210 and the input voltage
rail respectively to absorb the very large voltage
potential. The current peak value was decided by
the sensing resistor in the CS pin, the low side
device was turned off by the current peak detection
then delay a fixed off time that set by the resistor in
the RT pin of GR8210.
There are PWM and liner dimming in the GR8210 to
adjust the LED brightness. In the abnormal
operation, the inner OTP function and the external
OTP by the NTC resistor could protect the IC
damage.
* Switching dimming and system over-temperature dimming are
option functions, see below feature list
SOP-8
X – Feature Code
XXXXX – Date Code
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.
2009.07 Ver. B Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
1
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Preliminary GR8210
Electrical Characteristics (VCC = 5V, TA = 25°C, unless otherwise specified.)
Parameter
Symbol
Test Conditions
Min
INPUT VOLTAGE
Input voltage range
VCC SECTION
VIN With Cascode NMOSFET
5
VCC UVLO
VCC UVLO hysteresis
Operation current
ST SECTION
VUVLO
VUV LOHY
IQ-OP Normal Operation
4.8
0.3
Start up voltage in normal operation
Start up current at 156V
CURRENT SENSE SECTION
VST IST = 50µA
IST VIN = 156V, RST = 2MΩ
12
50
Peak current reference voltage
VCS1
VIN = 312V,. L = 4.7µH, RLOAD =
10Ω, RCS = 0.3Ω, asynchronous
rectifier: xxxx.
240
Leading edge blanking time
TLEB
500
INTERNAL POWER NMOSFET SECTION
Turned on resistance
VCC = 5V, VCS = 0.1V, RDRN = 10KΩ
RDS(ON)
0.3
from VIN to DRN.
EN SECTION
Enable threshold
Enable function hysteresis
Delay cycles of enable pin
RT SECTION
VEN
VEN_HYS
TEN_D
0.85
RT threshold voltage
Constant off time
Constant off time
DIMMING FUNCTION (LD/PD)
VRT VCC = 5V, RRT = 200KΩ.
TOFF VCC = 5V, RRT = 200KΩ.
TOFF_default VCC = 5V, RT to VCC.
1.14
20.5
9
PWM dimming input low voltage
threshold
VOL
-
PWM dimming input high voltage
threshold
VOH
2
Linear dimming voltage threshold of
100% current regulation
VL_MAX 100% Output Current.
0.475
Typ
-
5.0
0.65
0.5
15
70.5
250
600
0.7
0.9
0.1
32
1.2
22.5
10
-
-
0.5
Max Units
450 V
5.2 V
V
0.9 mA
18 V
90 µA
260 mV
700 ns
1.0 Ω
0.95 V
V
Cycles
1.26 V
24.5 µs
11 µs
0.9 V
-V
0.525 V
2009.07 Ver. B Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
5
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Preliminary GR8210
Figure-8 The sketch map of Brown In/Out setting.
Over Temperature Protection (OVP)
The GR8210 provides an inner over temperature
protection function to prevent the system damage.
In some abnormal situation, a high temperature
could trip the OTP to latch off the GR8210. The
users should power on again to reset this latch.
Short Circuit Protection
In the Figure-9, the IOUT runs away due to the IVALLEY
always higher than IPEAK in the short circuit
conditions. To prevent this situation, the GR8210
could increase the TOFF by product a multiplier to
control the IVALLEY stay below IPEAK. The multiplier
might be 2, 4 and 8 that decided by the GR8210
control scheme.
PCB Layout Consideration
Figure-10 shows the PCB layout considerations of
GR8210. These guidelines detailed below.
(1) Locate the U1, RS, CIN, D5, L1 and M1 closely
each other to reduce the current loop of on
period and off period.
(2) Locate the RS, C1 and CST close to the GR8210
as possibly.
(3) Locate the M1 to the GR8210 close as possibly
to reduce the distance between the source
terminal of M1 and pin1 of U1.
GND
ZC
C C1
CST
M1
R
GR8210
D5 D
U1
R RS
GND CIN
GND
L1
L
LED
CLED
LED
VIN
Top Layer
Bottom Layer
ON Period Current Loop
OFF Period Current Loop
Figure-10 The PCB layout sketch map shown the
layout considerations and the relative locations of
the key components.
Figure-9 The sketch waveforms to illustrate the
short circuits protection.
2009.07 Ver. B Copyright Grenergy OPTO, Inc. www.grenergy-ic.com
11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet GR8210.PDF ] | |
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