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LED Driver. MT7933 Datasheet

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LED Driver. MT7933 Datasheet






MT7933 Driver. Datasheet pdf. Equivalent




MT7933 Driver. Datasheet pdf. Equivalent





Part

MT7933

Description

AC-DC LED Driver



Feature


Maximizing IC Performance MT7933 Single Stage, High PFC, AC-DC LED Driver DES CRIPTION MT7933 is a single-stage,pri mary side control AC-DC LED driver with active power factor correction. MT7933 integrates on-chip PFC circuit operate s in critical conduction mode (CRM) to achieve high power factor and reduce th e power MOSFET switching loss. With MAX IC Proprietary contr.
Manufacture

Maxic Technology

Datasheet
Download MT7933 Datasheet


Maxic Technology MT7933

MT7933; ol technique, precision LED current is a chieved without secondary side sense an d feedback circuit including opto-coupl er. MT7933 provides various protections , such as over current protection (OCP) , over voltage protection (OVP), short circuit protection (SCP) and over tempe rature protection (OTP), etc, to improv e system reliability. Typical Applicati on Circuit FEATUR.


Maxic Technology MT7933

ES Single-stage Active PFC for high pow er factor and low THD Primary side con trol eliminates opto-coupler High prec ision LED current (+/-3%) Critical Con duction Mode operation Up to 20W drivi ng capability. Cycle-by-cycle current limit .


Maxic Technology MT7933

.

Part

MT7933

Description

AC-DC LED Driver



Feature


Maximizing IC Performance MT7933 Single Stage, High PFC, AC-DC LED Driver DES CRIPTION MT7933 is a single-stage,pri mary side control AC-DC LED driver with active power factor correction. MT7933 integrates on-chip PFC circuit operate s in critical conduction mode (CRM) to achieve high power factor and reduce th e power MOSFET switching loss. With MAX IC Proprietary contr.
Manufacture

Maxic Technology

Datasheet
Download MT7933 Datasheet




 MT7933
Maximizing IC Performance
MT7933
Single Stage, High PFC, AC-DC LED Driver
DESCRIPTION
MT7933 is a single-stageprimary side control
AC-DC LED driver with active power factor
correction. MT7933 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.
MT7933 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.
Typical Application Circuit
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
Up to 20W driving capability.
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
Compact SOT23-6 package
APPLICATIONS
AC/DC LED driver applications
Signal and decorative LED lighting
E14/E27/PAR30/PAR38/GU10 LED lamp
T8/T10 LED String
MT7933 Rev. 1.10
www.maxictech.com
Copyright © 2012 Maxic Technology Corporation
Page 1




 MT7933
Maximizing IC Performance
MT7933
Single Stage, High PFC, AC-DC LED Driver
ABSOLUTE MAXIMUM RATINGS
VDD Voltage
DRV Pin Voltage
COMP/CS/DSEN Pins Voltage
Power Dissipation ( TA=25°C, SOT23-6)
Lead Temperature (soldering, 10 sec.)
Storage Temperature
-0.3V to VDD Clamp
-0.3V to 24V
-0.3V to 5V
0.6W
260°C
-55°C to 150°C
Recommended operating conditions
Supply voltage
Operating Temperature
7.2V to 23V
-40°C to 105°C
Thermal resistance
Junction to ambient (RθJA)
Junction to Case (RθJC)
170°C/W
130°C/W
Ordering information
7933□□□
Week code
Year code
Optional Spec code
Device
MT7933
Package
Type
SOT23-6
Quantity
per reel
3000
Device
mark
7933
PIN CONFIGURATIONS
PIN DESCRIPTION
Name
COMP
GND
CS
DRV
VDD
DSEN
Pin No.
1
2
3
4
5
6
Description
Internal EAs output. Connect a capacitor to ground for frequency compensation.
Ground.
Current Sense Pin.
Gate drive output for primary MOSFET.
Power Supply.
The voltage feedback from auxiliary winding. Connected to a resistor divider from
auxiliary winding to sense output voltage.
MT7933 Rev. 1.10
www.maxictech.com
Copyright © 2012 Maxic Technology Corporation
Page 2




 MT7933
Maximizing IC Performance
MT7933
Single Stage, High PFC, AC-DC LED Driver
ELECTRICAL CHARACTERISTICS
(Test conditions: VDD=12V, TA=25°C unless otherwise stated.)
Symbol Parameter
Conditions
Min Typ Max Unit
Start-up (VDD pin)
ISTART
UVLO
VSTART
Start up Current
Lower Threshold Voltage of VDD
Start-up Voltage
Supply Current
VDD Pin ramp down
VDD Pin ramp up
25 50 μA
7.2 V
18 V
Iq Quiescent Current
Control Loop
No switching
1.2 mA
VFB
VCOMPH
SCP
Primary Current Sense Voltage
Upper Limit of COMP
Short Circuit Protection Threshold
at DSEN pin
392 400 408 mV
2.0 V
400 mV
Over Voltage Protection
OVP1
Threshold at VDD pin
24 V
Over Voltage Protection
OVP2
Threshold at DSEN
3.2 V
TOFF_min Minimum OFF time
Current Sense (CS pin)
6.4 us
LEB Leading Edge Blanking of CS
240 nS
OCP Over Current Protection at CS pin
1.8 V
Thermal Protection
OTP Over temperature protection
150
Over temperature release
hysteresis
20
Drive Stage (DRV pin)
TR Rising Time
TF Falling Time
CL=1nF, DRV Pin Falls
from VDD to 0V
CL=1nF, DRV Pin Rises
from 0V to VDD
50
30
nS
nS
Note:
RθJA is 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 2X 2FR-4 substrate PCB, 2oz copper, with minimum recommended pad on top layer and thermal
vias to bottom layer ground plane.
Guaranteed by design.
MT7933 Rev. 1.10
www.maxictech.com
Copyright © 2012 Maxic Technology Corporation
Page 3



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