Macroblock
Preliminary Datasheet
MBI6804
Two Step Dimmable Isolated AC/DC LED Driver
Features
Constant current LED driver Primary side regulation without photocoupler Built-in active power factor correction Quasi-resonant switching Universal input voltage range Support up to 50W output Full protections: Thermal shutdown
VDD over voltage (OVP) Under voltage lock-out (UVLO) LED open-/short- circuit Current sensing resistor open/short-circuit Compensating capacitor open/short-circuit Available in SOP-8 package 2 steps dimmable by input voltage toggling High 2nd step output current accuracy Package MSL Level : 3
Product Description
MBI6804 is a universal input AC-DC converter designed to deliver constant current with primary side regulation (PSR) control. The built-in active power factor correction circuit maintains high power factor over a wide input voltage range. MBI6804 is optimized for applications of output power up to 50 Watt, and the efficiency is enhanced with quasi-resonant switching technique. MBI6804 is also featured with under voltage lock-out (UVLO), over temperature protection (OTP), LED open-circuit protection and LED short-circuit protection to protect the converter from being damaged accidentally. MBI6804 is specifically designed with current sensing resistor short protection to prevent MOSFET over-current and transformer saturation caused by manufacturing defect such as solder splash or abnormal operation such as accidental short-circuit by earthquake.
Applications
T8 light tube LED alternative solutions E26/E27 light bulb LED alternative solutions PAR light LED alternative solutions External LED power supply
©Macroblock, Inc., 2015 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]
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July 2015, V3.00
MBI6804
Two Step Dimmable Isolated AC/DC LED Driver
Typical Application Circuit
Fig.1 Typical application circuit of MBI6804
Functional Diagram
Fig.2 Functional diagram of MBI6804 -2-
July 2015, V3.00
MBI6804
Two Step Dimmable Isolated AC/DC LED Driver
Pin Configuration
VDD 1
COMP 2 CDIM 3 RDIM 4
MBI 6804
8 GATE 7 CS 6 GND 5 VS
Fig. 3 Pin configuration of MBI6804
Pin Description
Pin
VDD COMP CDIM RDIM
VS GND CS GATE
Number
1 2 3 4 5 6 7 8
Description
Supply voltage terminal Terminal to connect the compensator Terminal to connect the Cdim capacitor Terminal to connect the Rdim resistor Terminal to connect the sensing circuit of the auxiliary winding voltage Ground terminal Terminal to connect the MOSFET current sensing resistor Terminal to connect the gate of the external MOSFET
July 2015, V3.00 -3-
MBI6804
Two Step Dimmable Isolated AC/DC LED Driver
Absolute Maximum Ratings
NOTE: Operations above the maximum ratings may cause device failure or reduce device reliability.
Characteristics
Supply voltage CS pin input voltage VS pin input voltage COMP pin input voltage Gate pin output voltage CDIM pin input voltage RDIM pin input voltage Junction temperature Operating ambient temperature Storage temperature
Human body mode ESD protection
Machine mode
Power dissipation (On 4 layer PCB, Ta=25°C) Thermal resistance (By simulation, on 4 layer PCB)*
Symbol
VDD VCS VVS VCOM VGATE VCDIM VRDIM TJ,MAX TOPR TSTG HBM(MIL-STD_833H METHOD 3015.8) MM(ANSI/ESD S5.2-2009)
PD
Rth(j-a)
Min
-0.3 -0.3 -0.3 -0.3 -0.3 -0.3 -0.3
-40 -55
-
-
-
-
*The PCB size is 76.2mm x 114.3mm in simulation. Please refer to JEDEC JESD51.
Max
22 7 7 7 16 7 7 150** 85 150 Class 3A (5KV) Class M4 (450V)
3.13
72.1
Unit
V V V V V V V °C °C °C
-
-
W
°C/W
** Operation at the maximum rating for extended periods may reduce the device reliability; therefore, the suggested
junction temperature of the device is under 125°C.
Note: The performance of thermal dissipation is strongly related to the size of thermal pad, thickness and layer
numbers of the PCB. The empirical thermal resistance may be different from simulative value. Users should plan
for expected thermal dissipation performance by selecting package and arranging layout of the PCB to maximize
the capability.
July 2015, V3.00 -4-
MBI6804
Two Step Dimmable Isolated AC/DC LED Driver
Electrical Characteristics
Test condition: VDD=18V, CIN=10μF, and TA=25°C unless otherwise specified.
Characteristics
Symbol Conditions Min
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
-
VDD=18V,CL=1nF, FSW=20kHz
VDD=18V,CL=1nF, FSW=120kHz
IDD before start-up
18 -
-
-
Error Amplifier
Reference Voltage
COMP Pre-charge Voltage
COMP Clamping Voltage
Maximum COMP Charging Current
VREF
∆VPC
VCLAMP
ICOMP
At first start up -
1.176 -
Current Sense
Current Limit Threshold Voltage
VCL -
0.9
Voltage Sense
VS Pin Sourcing Current
ISource_VS
VS=-0.3V
--
Gate Driver
Output high voltage
Output low voltage.