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PDF RM3253S Data sheet ( Hoja de datos )
| Número de pieza | RM3253S | |
| Descripción | Off Line AC/DC Switcher IC | |
| Fabricantes | REACTOR | |
| Logotipo |  |
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RM3253S
RM3253S
Off Line AC/DC Switcher IC
Description
The RM3253S series switcher ICs cost effectively replace all power supplies up to 5W output power based on
unregulated isolated linear transformer (50/60HZ). Unlike conventional PWM (pulse width modulation)
controllers, they regulate the output voltage in a new method of off-time modulation control. The controller
consists of a VCO (voltage control oscillator), Sense and logic circuit, VDD pin, under-voltage lockout circuit,
protection for over-voltage, current limited circuit, leading edge blanking, over load protection and fault condition
auto-restart. They are ideal low power AC/DC adapter/charger solution for portable devices,
Features
• Built-in 800V high voltage BJT and minimal external componets
• Low start-up current: Typ.15 μA Max.25 μA
• UVLO(under voltage lockout):Typ.12V start-up Typ.6V shut-down
• Low operating current:Typ.2 mA Max.5 mA
• LEB(leading edge blanking): Typ.300ns
• OVP(over voltage protection): Typ.28 V
• Operation Frequency: Typ.54KHZ(VDD=21V)
• Output Driver Ability: Typ.15 mA
• OLP(over load protection)
• Universal AC input range
• Constant voltage and constant current
• SOP-8 package.
Applications
•AC/DC adapter/charger for cell/cordless phones, digital cameras, MP3/portable audio devices etc
• LED Lighting
• Replacements for linear transformers and RCC SMTPS
Package
1
1 page  
Dimension
SOP-8
RM3253S
Symbol
A
A1
A2
B
C
D
E
e
H
L
y
θ
Dimensions In Millimeters
Min.
1.40
Nom.
1.60
Max.
1.75
0.10 -
0.25
1.30 1.45
1.50
0.33 0.41
0.51
0.19 0.20
0.25
4.80 5.05
5.30
3.70 3.90
4.10
- 1.27
-
5.79 5.99
6.20
0.38 0.71
1.27
--
0.10
0° -
8°
Dimensions In Inches
Min.
0.055
Nom.
0.063
Max.
0.069
0.040
- 0.100
0.051
0.057
0.059
0.013
0.016
0.020
0.0075
0.008
0.010
0.189
0.199
0.209
0.146
0.154
0.161
-
0.050
-
0.228
0.236
0.244
0.015
0.028
0.050
- - 0.004
0° - 8°
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet RM3253S.PDF ] | |
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