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Datasheet MT7933 PDF ( 特性, スペック, ピン接続図 )

部品番号 MT7933
部品説明 AC-DC LED Driver
メーカ Maxic Technology
ロゴ Maxic Technology ロゴ 
プレビュー
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MT7933 Datasheet, MT7933 PDF,ピン配置, 機能
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

1 Page



MT7933 pdf, ピン配列
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


3Pages


MT7933 電子部品, 半導体
Maximizing IC Performance
PACKAGE INFORMATION
MT7933
Single Stage, High PFC, AC-DC LED Driver
MT7933 Rev. 1.10
www.maxictech.com
Copyright © 2012 Maxic Technology Corporation
Page 6

6 Page





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