www.DataSheet4U.com
CR6848
Electrical Characteristics (Ta=25°C unless otherwise noted, VDD = 15V.)
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
Supply Voltage (VDD Pin)
IST
Startup Current
10
µA
mA
mA
mA
V
VFB=0V
2.8
ISS
Operating Current
VFB=3V
2.3
VFB=Open
1.46
16.1
11.1
26.7
VDDON
Turn-on Threshold Voltage
VDDOFF Turn-off Threshold Voltage
VDCLAMP VDD Clamp Voltage
Voltage Feedback (FB Pin)
V
IVDD=20mA
V
IFB
Short Circuit Current
Open Loop Voltage
Enter PFM, FB current
Enter CRM, FB current
VFB=0V
2.8
4.8
mA
V
VFB
IPFM
ICRM
VFB=Open
0.92
1.5
mA
mA
Current Sensing (SEN Pin)
VTH_L
VTH_H
TPD
Minimum Voltage Lever
0.83 0.87
V
V
Maximum Voltage Lever
Delay to Output
1.0
300
50
1.05
63
ns
KΩ
RCS
Input Impedance
Oscillator (RI Pin)
FOSC
FPFM
Normal Frequency
PFM Frequency
RI=100Kohm
RI=100Kohm
RI=100Kohm
-30-85℃
53
58
11.6
75
KHz
KHZ
%
DCMAX Maximum Duty Cycle
ΔFTEMP Frequency Temp. Stability
5
%
TBLANK
Leading-Edge Blanking Time
300
nS
GATE Drive Output (GATE Pin)
VOL
VOH
TR
Output Low Level
Output High Level
Rising Time
VDD=15V, IO=20mA
VDD=15V, IO=20mA
CL=1000pF
1
V
V
8
450
130
16.5
ns
ns
V
TF
Falling Time
CL=1000pF
VGCLAMP Output Clamp Voltage
VDD=20V
Dec, 2006
V1.5
5/14
Chengdu
Chip-Rail
Tech.Co.Ltd.
http://www.chiprail.com
ETC [ ETC ]
