RS2253 Orister Corporation, RS2253 Datasheet - Page 4

• Manufacturer Part Number: RS2253
• Description: Secondside Regulation Current Mode Pwm Power Switcher
• Manufacturer: Orister Corporation

Electrical Characteristics
DS‐RS2253‐10 May, 2010
UVLO(OFF)
UVLO(ON)
OVP(ON)
V
T
T
Symbol
V
I
Z
ΔF_V
ΔF_V
FB_SHORT
SOFTSTART
ΔF
B_V
DD_CLAMP
V
R
V
V
BLANKING
F
I
SENSE_IN
Z
T
FB_OPEN
D
T
startup
F
I
DS(ON)
TH_OC
BURST
TH_0D
TH_PL
FB_IN
D_OC
VDD
D_PL
OSC
MAX
TEMP
DSS
DD
DD
V
Operation Current
V
V
Over voltage protection voltage
V
V
FB pin short circuit current
Zero Duty Cycle FB Threshold Voltage
Power Limiting FB Threshold Voltage
Power Limiting Debounce Time
Input Impedance
Soft start time
Leading edge blanking time
Input Impedance
Over Current Detection and Control Delay
Internal Current Limiting Threshold Voltage
Normal Oscillation Frequency
Frequency Temperature Stability
Frequency Voltage Stability
Maximum duty cycle
Burst Mode Base Frequency
MOSFET Drain Source Breakdown Voltage
Static Drain to Source On Resistance
Frequency Modulation range /Base
frequency
DD
DD
DD
DD
FB
Open Loop Voltage
Start up Current
Under Voltage Lockout Enter
Under Voltage Lockout Exit(Recovery)
Zener clamp Voltage
Parameter
(T
A
=25°C, V
Feedback Input Section(FB pin)
Current Sense Input(Sense Pin)
DD
=16V, unless otherwise specified)
Power MOSFET Section
Supply Voltage (V
Frequency
Oscillator
V
Leakage current into V
V
‐
‐
CS=0V, FB=3V Ramp up V
until gate clock is off
‐
Short FB pin to GND and
measure current
‐
‐
‐
‐
‐
‐
‐
From Over Current Occurs
till the Gate drive output
start to turn off
FB=3.3V
‐
‐
‐
FB=3.3V, CS=0V
‐
V
V
‐
DD
FB
GS
GS
=3V
=0V, I
=10V, I
=14.5V, Measure
Test Conditions
DD
I
DS
)
DD
DS
=250uA
=10mA
=1A
DD
DD
14.2
27.0
0.76
Min
600
8.5
5.4
45
70
‐4
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
Typ.
14.8
28.5
1.55
300
120
2.0
9.0
5.6
0.8
3.7
0.8
5.0
30
50
40
50
80
22
3
4
4
5
5
‐
‐
www.Orister.com
Max
16.0
30.0
0.82
9.5
6.0
5.8
20
55
90
4
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
‐
Page No. : 4/9
Unit
KHz
KHz
mA
mA
ms
KΩ
ms
KΩ
uA
ns
ns
%
%
%
%
Ω
V
V
V
V
V
V
V
V
V