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PDF TD8218 Data sheet ( Hoja de datos )
| Número de pieza | TD8218 | |
| Descripción | 3A constant load current Boost DC/DC Controller | |
| Fabricantes | Techcode | |
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T echcode®
3A constant load current Boost DC/DC Controller
DATASHEET
TD8218
General Description
Features
TD8218 is a compact, high efficiency, fixed frequency Boost
DC/DC regulator. PFM mode for improved efficiency at low
output power. The 1MHz high switching frequency allows
smaller inductor and output capacitor, making the TD8218
ideally suited for small battery‐powered applications and
internal compensation reduce external component count and
saves PCB space.
The TD8218 contains thermal shutdown function and over
current protection circuit. Built‐in soft‐start circuitry
prevents excessive inrush current during start‐up.
The TD8218 is available in a Pb‐free, SOP‐8 package.
Boost DC/DC regulator with 3A constant load
current
With internal NMOS.
Device quiescent current: 280uA.
Internal soft_start and internal compensation.
6A maximum peak current limit.
Switching frequency: 1MHz.
Power save mode(PFM) for improved efficiency at
low output power
Over current protect and over temperature
protection.
Compact package: SOP‐8.
Applications
Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
Pin Configurations
VIN 1
8 GND
EN 2
7 GND
GND 3 TD8218 6 LX
FB 4
5 LX
Figure1 Pin Configuration of TD8218(Top View)
March, 20, 2013. Techcode Semiconductor Limited www.techcodesemi.com
1
1 page  
T echcode®
3A constant load current Boost DC/DC Controller
Soft Start
steps
Time
Current Sense
Current sense transconductance
GCS
Current limit
8
64
8.8
6
DATASHEET
TD8218
µS
A/V
A
Parameters
EA
Feedback voltage
EA voltage gain
EA transconductance
Driver
Rising edge time
Falling edge time
Enable
EN open voltage
En shut voltage
Hysteresis
Symbol
Test Condition
Min. Typ. Max. Unit
VFB
Av
Gm
0.587
0.603
70
12.8
0.613
db
µA/V
37.6 ns
34 ns
0V to 2V
2V to 0V
725 mV
708 mV
17 mV
March, 20, 2013. Techcode Semiconductor Limited www.techcodesemi.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet TD8218.PDF ] | |
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