MT-7933 Просмотр технического описания (PDF) - Unspecified
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MT-7933 Datasheet PDF : 7 Pages
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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 Start up Current
UVLO Lower Threshold Voltage of VDD
VSTART 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
50②
nS
from VDD to 0V
CL=1nF, DRV Pin Rises
30②
nS
from 0V to VDD
Note:
① 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.
② Guaranteed by design.
MT7933 Rev. 1.20
www.maxictech.com
Copyright © 2012 Maxic Technology Corporation
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