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PDF MBI6802 Data sheet ( Hoja de datos )
| Número de pieza | MBI6802 | |
| Descripción | High Power Factor AC/DC LED Driver | |
| Fabricantes | Macroblock | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MBI6802 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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Macroblock
Preliminary Datasheet
MBI6802
High Power Factor AC/DC LED Driver
Features
Constant current LED driver
Macroblock patent-pending primary side regulation (PSR)
Built-in active power factor correction
Support 85VAC - 265VAC universal input voltage range
Support up to 28W output
Full protection: thermal/UVLO/soft-start/LED open-/short- circuit
Available in SOP-8 package
Product Description
MBI6802 is a universal input AC-DC converter designed to deliver constant current to high power LED with primary
side regulation (PSR) control (US/TW patent pending). With the built-in active power factor correction circuit,
MBI6802 adjusts its input current according to the main waveform to maintain high power factor. MBI6802 is
optimized for applications based on flyback converter with output power up to 28 Watt. It is designed to operate in
boundary conduction mode (BCM) or discontinuous conduction mode (DCM). In addition, the embedded soft-start
function eliminates the inrush current during the power-on period. MBI6802 also features under voltage lock-out
(UVLO), over-temperature protection, LED open-circuit protection and LED short-circuit protection to protect IC
from being damaged accidentally.
Applications
T8 light tube LED alternative solutions
E26/E27 light bulb LED alternative solutions
PAR light LED alternative solutions
©Macroblock, Inc., 2013
6F-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30072, R.O.C.
TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: [email protected]
- 1 - May 2013, V.1.02
1 page  
MBI6802
High Power Factor AC/DC LED Driver
Electrical Characteristics
Test condition: VDD=20V, CIN=10μF, and TA=25°C unless otherwise specified.
Characteristics
Symbol
Conditions
Supply Voltage
Continuous operating voltage
Start-up voltage
Under-voltage lockout
VDD over-voltage protection
Operating current
Stand-by current
VOP
VSTART UP
VUVLO
VDD-OVP
IDD-OP
IDD-ST
start-up
UVLO
IDD before start-up
CT (Oscillator Frequency Adjustment)
Charging current
Threshold voltage
Maximum oscillator frequency
Minimum oscillator frequency
Frequency variation over VDD
Frequency variation over temperature
FOSC
VCTTH
FOSC,MAX
FOSC,min
fDV
fDT
VDD=8V-28V
Temp.=-40-85
Current Sense
Propagation delay to GATE output
Leading edge blanking time
Threshold voltage for current limit
TPD
TLEB
VCSTH
Over-Voltage Protection (OVP)
Open protection threshold
Open protection hysteresis
VS-open
VS-open-Hys
Gate Driver
Maximum duty ratio
Output high voltage
Output low voltage
Rising time
Falling time
DMAX
VOH
VOL
TR
TF
20%-80% of full swing
20%-80% of full swing
Thermal Shutdown
Thermal shutdown threshold
TSD Hysteresis=30
Soft Start
VOCP ramp period
-
Min Typ Max
8 20 28
14 16 18
6.5 8 9.5
26 28 30
- -5
- 25 40
-6-
- 1.2 -
- 150 -
- 30 -
- -5
- - 25
- 100 200
100 200 400
2.4 2.5 2.6
1.4 1.5 1.6
- 0.1 0.2
- 50 -
14 15 16
- - 0.5
- 125 250
- 40 100
- 155 -
- - 10
Unit
V
V
V
V
mA
uA
uA
V
kHz
kHz
%
%
ns
ns
V
V
V
%
V
V
ns
ns
°C
ms
- 5 - May 2013, V1.02
5 Page 
MBI6802
High Power Factor AC/DC LED Driver
Internal Soft-Start Protection
The embedded soft-start function of MBI6802 prevents damage caused by inrush current during the power-on
period. It is realized by the cycle-by-cycle over-current protection of the external power MOSFET, which is achieved
by detecting the voltage at pin CS. When the voltage at pin CS exceeds the preset value VOCP, the converter will
terminate the GATE signal. In MBI6802, VOCP rises from 1.25V to 2.5V within 1ms upon start-up, as shown in
Fig.12. After the soft-start completes, VOCP is kept at 2.5V to limit the maximum current in the MOSFET during
normal operations.
VOCP(V)
2.5
1.25
time(ms)
1
Fig. 12 soft-start operation of MBI6802
LED Open-Circuit Protection
Fig.13 LED open-circuit protection
The operation of LED open-circuit protection is illustrated in Fig.13. When the LED is open-circuited, the output
voltage rises, causing the voltage at the auxiliary winding and pin VS to rise accordingly. Once the voltage at pin
VS exceeds the preset threshold VO_OPEN, the switching frequency is immediately demoted to 1kHz while VOCP is
reset to zero and the system restarts from the soft-start mode again. Only when the open-circuit condition is
removed will the system resume normal operations without re-powering on the entire system.
- 11 -
May 2013, V1.02
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet MBI6802.PDF ] | |
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