SD4870TR Datasheet, PDF (3/8 Pages) Silan Microelectronics Joint-stock – CURRENT MODE PWM CONTROLLER

ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Tamb=25°C)
Characteristics
VDD
Startup Current
Operation Current
UVLO Threshold Voltage
UVLO Hysteresis Voltage
VDD Clamp Voltage
Feedback
PWM Gain
FB Open Loop Voltage
FB Short Circuit Current
FB OL Threshold Voltage
OL Debounce Time
FB Input Impedance
Maximum Duty Cycle
Current Sense
LEB Time
SENSE Input Impedance
OC Control Delay
OC Detection Threshold
Switching Frequency
Ocsillation Frequency
Frequency Stability With
VDD
RI External Resistance
Range
Light Load Mode
Frequency
Frequency Shuffling Range
Gate Driver
Output Low Level
Output High Level
Output Clamp Voltage
Level
Output Rising Time
Output Falling Time
Symbol
Test Condition
IVDD_ST
IVDD
VUVLO
VUVLOH
VVDD_CLP
VDD=12 V,RI=100kΩ
VDD=16V, VFB =3V,
RI=100kΩ
IVDD =10mA
AVCS
VFB_OPEN
IFB_SHORT
VFB_OL
TD_OL
ZFB_IN
DMAX
ΔVFB /ΔVSENSE
FB short connected to
ground
VDD=16V, RI=100kΩ
VFB =3V,VSENSE =0V
TLEB
ZSENSE_IN
TOC
VSENSE_OC
RI=100kΩ
fS
ΔfS_VDD
RI=100kΩ
VDD=12~25V,RI=100kΩ
RRI_RANGE
fS_LLM
ΔfS_SHUF RI=100kΩ
VOL
VOH
VDD=16V, IO=-20mA
VDD=16V, IO=20mA
VOH_CLAMP
TR
VDD=16V,CL=1nF
TF
VDD=16V,CL=1nF
Min.
--
--
13.3
--
--
--
4.5
0.8
--
4
--
--
--
--
0.7
60
--
50
--
-3
--
10
--
--
--
Typ. Max.
3
20
2
--
14.3 15.3
6.3
--
21.5
--
2
--
4.8
5
1
1.2
3.8
--
35
--
6
--
75
--
300
--
85
--
75
--
0.75 0.8
65
70
5
--
100 150
22
--
--
3
--
0.8
--
--
13
--
220
--
70
--
Unit
μA
mA
V
V
V
V/V
V
mA
V
ms
kΩ
%
ns
kΩ
ns
V
kHz
%
kΩ
kHz
%
V
V
V
ns
ns
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.0 2009.09.22
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