SM8121, SM8121A, SM8121AH-EL Selling Leads, Datasheet
MFG:NPC Package Cooled:IC SOT23-.. D/C:06+
SM8121, SM8121A, SM8121AH-EL Datasheet download
Part Number: SM8121
MFG: NPC
Package Cooled: IC SOT23-..
D/C: 06+
SM8121, SM8121A, SM8121AH-EL
- Table of contents:
Info of SM8121
Info of SM8121A
Info of SM8121AH-EL
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About SM8121A
PDF/DataSheet Download
Datasheet: SM8121A
File Size: 381008 KB
Manufacturer: NPC [Nippon Precision Circuits Inc]
Download : Click here to Download
About SM8121A
PDF/DataSheet Download
Datasheet: SM8121A
File Size: 381008 KB
Manufacturer: NPC [Nippon Precision Circuits Inc]
Download : Click here to Download
About SM805
PDF/DataSheet Download
Datasheet: SM805
File Size: 247038 KB
Manufacturer:
Download : Click here to Download
SM8121A General Description
The SM8121A is a high efficiency step-up DC-DC converter. Due to high voltage CMOS process realizing 25V output supply as maximum value, 2 to 6 lights of white LED connected in series can be lighted. By connecting in series, current variation among LED is eliminated. Current value sent to white LED can be set by external resistors. In addition, brightness can also be adjusted by control to FB pin or CE pin.
SM8121A Maximum Ratings
| Parameter |
Symbol |
Rating |
Unit |
| Supply voltage range |
VDD |
− 0.3 to 6.5 |
V |
| Input voltage range |
VIN |
VSS 0.3 to VDD + 0.3 |
V |
| SW output voltage range |
VSW |
0.3 to 27 |
V |
| SW input current |
ISW |
500 |
mA |
| Power dissipation |
PD |
250 (Ta = 25) |
mW |
| Operating temperature range |
Topr |
-40 to 85 |
|
| Storage temperature range |
Tstg |
-55 to 125 |
|
SM8121A Features
`Boost-up control using PWM
`2 to 6 lights of white LED (connected in series) lighted
`Output current value can be set by external resistors (51: 9.8mA, 33: 15.2mA, 24: 20.8mA)
`Brightness adjustable by control to FB pin or CE pin
`Current variation among LED decreased by high precision
`High efficient drive by step-up model
`Supply voltage range: 2.3 to 5.5V
`Maximum output voltage: 25V
`Quiescent current: 400A (typ)
`Standby current: 1.0A (max)
`RON(Switching MOS-Tr): 2(typ)
`Switching frequency: 1.0MHz (typ)
`Output current detection accuracy:±2%
`Small package: SOT23-5 (SM8121AH) SON-6 (SM8121AD)
`2 to 6 lights of white LED (connected in series) lighted
`Output current value can be set by external resistors (51: 9.8mA, 33: 15.2mA, 24: 20.8mA)
`Brightness adjustable by control to FB pin or CE pin
`Current variation among LED decreased by high precision
`High efficient drive by step-up model
`Supply voltage range: 2.3 to 5.5V
`Maximum output voltage: 25V
`Quiescent current: 400A (typ)
`Standby current: 1.0A (max)
`RON(Switching MOS-Tr): 2(typ)
`Switching frequency: 1.0MHz (typ)
`Output current detection accuracy:±2%
`Small package: SOT23-5 (SM8121AH) SON-6 (SM8121AD)
SM8121A Typical Application
·Cellular phone
·Pager
·Digital still camera
·Handy terminal
·PDAs
·Portable games
·White LED drive
·LCD bias supply
·Flash memory supply
·Pager
·Digital still camera
·Handy terminal
·PDAs
·Portable games
·White LED drive
·LCD bias supply
·Flash memory supply
SM8121A Connection Diagram
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