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LED Driver. MT79338 Datasheet

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LED Driver. MT79338 Datasheet






MT79338 Driver. Datasheet pdf. Equivalent




MT79338 Driver. Datasheet pdf. Equivalent





Part

MT79338

Description

AC-DC LED Driver



Feature


Maximizing IC Performance MT79338 Singl e Stage, High PFC, AC-DC LED Driver DE SCRIPTION MT79338 is a single-stage,p rimary side control AC-DC LED driver wi th active power factor correction. MT79 338 integrates on-chip PFC circuit oper ates in critical conduction mode (CRM) to achieve high power factor and reduce the power MOSFET switching loss. With MAXIC Proprietary co.
Manufacture

Maxic Technology

Datasheet
Download MT79338 Datasheet


Maxic Technology MT79338

MT79338; ntrol technique, precision LED current i s achieved without secondary side sense and feedback circuit including opto-co upler. Embedded with 600V power MOSFET, the peripheral circuit is simplified. MT79338 provides various protections, s uch as over current protection (OCP), o ver voltage protection (OVP), short cir cuit protection (SCP) and over temperat ure protection (OT.


Maxic Technology MT79338

P), etc, to improve system reliability. FEATURES Single-stage Active PFC for high power factor and low THD Primary side control eliminates opto-coupler H igh precision LED current (+/-3%) Crit ical Conduction Mode operation Cycle-b y-cycle current limiting Under-voltage lockout (UVLO) protection VDD and out put over voltage protection Adjustable constant current .


Maxic Technology MT79338

and output power setting Power on soft- start Embedded with 600V power MOSFET DIP8 package APPLICATIONS AC/DC LED d river applications Signal and decorati ve LED lighting E27/PAR30/PAR38/GU10 e tc.LED lamp T8/T10 LED String Typical Application Circuit Vin_ac R5 C1 C2 R2 D2 R6 D1 Lp C3 La R3 C4 MT79338 4 COMP GND 3 5 DSEN CS 2 6 VDD D RAIN 7 1 SMOUTR7C.

Part

MT79338

Description

AC-DC LED Driver



Feature


Maximizing IC Performance MT79338 Singl e Stage, High PFC, AC-DC LED Driver DE SCRIPTION MT79338 is a single-stage,p rimary side control AC-DC LED driver wi th active power factor correction. MT79 338 integrates on-chip PFC circuit oper ates in critical conduction mode (CRM) to achieve high power factor and reduce the power MOSFET switching loss. With MAXIC Proprietary co.
Manufacture

Maxic Technology

Datasheet
Download MT79338 Datasheet




 MT79338
Maximizing IC Performance
MT79338
Single Stage, High PFC, AC-DC LED Driver
DESCRIPTION
MT79338 is a single-stageprimary side control
AC-DC LED driver with active power factor
correction. MT79338 integrates on-chip PFC
circuit operates in critical conduction mode (CRM)
to achieve high power factor and reduce the
power MOSFET switching loss. With MAXIC
Proprietary control technique, precision LED
current is achieved without secondary side
sense and feedback circuit including
opto-coupler.
Embedded with 600V power MOSFET, the
peripheral circuit is simplified.
MT79338 provides various protections, such as
over current protection (OCP), over voltage
protection (OVP), short circuit protection (SCP)
and over temperature protection (OTP), etc, to
improve system reliability.
FEATURES
Single-stage Active PFC for high power
factor and low THD
Primary side control eliminates opto-coupler
High precision LED current (+/-3%)
Critical Conduction Mode operation
Cycle-by-cycle current limiting
Under-voltage lockout (UVLO) protection
VDD and output over voltage protection
Adjustable constant current and output
power setting
Power on soft-start
Embedded with 600V power MOSFET
DIP8 package
APPLICATIONS
AC/DC LED driver applications
Signal and decorative LED lighting
E27/PAR30/PAR38/GU10 etc.LED lamp
T8/T10 LED String
Typical Application Circuit
Vin_ac
R5
C1
C2
R2 D2
R6
D1 Lp
C3 La
R3
C4
MT79338
4
COMP
GND 3
5 DSEN
CS 2
6 VDD
DRAIN 7
1 SMOUTR7C99E0 DRAIN 8
R4
Rs
D3
Ls R10
VLED+
C5
VLED-
MT79338 Rev. 1.05
www.maxictech.com
Copyright © 2014 Maxic Technology Corporation
Page 1




 MT79338
Maximizing IC Performance
MT79338
Single Stage, High PFC, AC-DC LED Driver
ABSOLUTE MAXIMUM RATINGS
VDD Voltage
DRAIN Pin Voltage
COMP/CS/SOURCE/DSEN Pins Voltage
Lead Temperature (soldering, 10 sec.)
PDMAX(maximum power consumption)
Storage Temperature
Junction Temperature(Tj)
-0.3V to VDD Clamp
-0.3V to 600V
-0.3V ~ 5V
260°C
1.5W
-55°C ~ 150°C
150°C
Recommended operating conditions
Supply voltage
Operating Temperature
Thermal resistance
7.2V to 23V
-40°C to 105°C
Junction to ambient (RθJA)
170°C/W
Junction to Case (RθJC)
130°C/W
Note:
be measured in the natural convection at TA = 25°C on a low effective single layer thermal
conductivity test board of JEDEC 51-3 thermal measurement standard. Test condition: Device
mounted on 2” X 2” FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top
layer and thermal vias to bottom layer ground plane.
PIN CONFIGURATIONS
Chip Mark
MT79338
YY WW xxxx
Manufacture code
Week code
Year code
PIN DESCRIPTION
Name
Pin No.
SOURCE
1
CS 2
GND
3
COMP
4
DSEN
5
VDD
DRAIN
6
78
Description
Power MOS source
Current sense input
Ground
Internal EAs output. Connect a capacitor to ground for frequency compensation.
The voltage feedback from auxiliary winding. Connected to a resistor divider from
auxiliary winding to sense output voltage.
Power Supply
Power MOS drain
MT79338 Rev. 1.05
www.maxictech.com
Copyright © 2014 Maxic Technology Corporation
Page 2




 MT79338
Maximizing IC Performance
MT79338
Single Stage, High PFC, AC-DC LED Driver
ELECTRICAL CHARACTERISTICS
(Test conditions: VDD=12V, TA=25°C unless otherwise stated.)
Symbol Parameter
Conditions
Start-up (VDD Pin)
ISTART Start up Current
UVLO Lower Threshold Voltage of VDD
VSTART Start-up Voltage
Supply Current
VDD Pin ramp down
VDD Pin ramp up
Iq Quiescent Current
No switching
Control Loop
VFB Primary Current Sense Voltage
VCOMPH Upper Limit of COMP
SCP
Short Circuit Protection Threshold
at DSEN pin
Over Voltage Protection
OVP1
Threshold at VDD pin
Over Voltage Protection
OVP2
Threshold at DSEN
TOFF_min Minimum OFF time
Current Sense (CS Pin)
LEB Leading Edge Blanking of CS
OCP Over Current Protection at CS pin
Thermal Protection
OTP Over temperature protection
Over temperature release
hysteresis
POWER MOSFETDRAIN/SOURCE
BVDSS Drain-Source Breakdown voltage
RDSON Static drain-source on-resistance VGS=10V/IDS=2.0A
Min Typ Max Unit
25 50 μA
7.2 V
18 V
1.2 mA
392 400 408 mV
2.0 V
400 mV
24 V
3.2 V
6.4 us
240 nS
1.8 V
150
20
600 V
2.3 Ω
MT79338 Rev. 1.05
www.maxictech.com
Copyright © 2014 Maxic Technology Corporation
Page 3



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