WS3215
Electrical Characteristics(VIN=12V,T=25℃.(unless otherwise specified))（Note3，4）
Symbol
Parameter
Test Conditions
-
Min
Typ
Max
Unit
V
VIN
Supply Voltage
8
40
VUVLO
VUVLO,HYS
FSW
VIN UVLO Threshold
VIN Dscreasing
VIN Increasing
6.8
V
VIN UVLO Hysteresis
500
mV
MHz
Maximal Oscillating Frequency
1
Sensing Current
VCSN
Average Sensing Voltage
VIN-VCSN
95
100
±10
8
105
mV
%
VCSN_hys
ICSN
Turn-off Current
Sensing Voltage Hysteresis
Input Current from CSN
VIN-VCSN=50mV
VDIM<0.3V
uA
IOFF
Turn-off Current
50
5
uA
DIM Input
VDIM
Internal Supply Voltage
DIM floating
V
V
VDIM_H
VDIM_L
VDIM_DC
fDIM
High Level for DIM Input Voltage
Low Level for DIM Input Voltage
Dimming Rang with a DC Voltage
Maximal PWM Dimming Frequency
Duty Range of PWM Dimming
at low frequency
2.5
0.5
0.3
2.5
50
V
V
fOSC=500kHz
fDIM =100Hz
kHz
0.02%
4%
1
DPWM_LF
PWM Dimming Ratio at low frequency
Duty Range of PWM Dimming
at high frequency
5000:1
fDIM =20KHz
1
DPWM_HF
PWM Dimming Ratio at high frequency
Pull-up Resistance between DIM and
internal Supply Voltage
25:1
1.2
RDIM
MΩ
uA
IDIM_L
Leakage Current
VDIM= 0
4.2
Switching
VIN =24V
VIN =12V
0.5
0.5
RSW
SW Turn-on Resistance
Ω
ISWmean
ILEAK
SW Continuous Current
SW Leakage Current
1.5
5
A
0.5
uA
Thermal Protection
TSD
OTP Threshold
OTP Hysteresis
160
20
℃
℃
TSD_hys
Note 3：Typical numbers are measured at 25°C as standard parameter.
Note 4 ： In this datasheet, design methods, measurement and statistical analysis guarantee the typical value while
measurement guarantees the range between the minimum and maximum.
4/9
Steady, keep you advance
WINSEMI [ SHENZHEN WINSEMI MICROELECTRONICS CO., LTD ]
