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PAM2803
Document number: DS36400 Rev. 2 - 2
1 of 9
www.diodes.com
December 2014
© Diodes Incorporated
PAM2803
A Product Line of
Diodes Incorporated
3W HIGH POWER WHITE LED DRIVER
Description
The PAM2803 is a step-up DC-DC converter that delivers a regulated
output current. The device switches at a 1.0MHz constant frequency,
allowing for the use of small value external inductor and ceramic
capacitors.
The PAM2803 is targeted to be used for driving loads up to 1A from a
two-cell alkaline battery. The LED current can be programmed by the
external current sense resistor, R
S
, connected between the feedback
pin (FB) and ground. A low 95mV feedback voltage reduces the
power loss in the Rs for better efficiency. With its internal 2A, 100mΩ
NMOS switch, the device can provide high efficiency even at heavy
load. During the shutdown mode, the feedback resistor R
S
and the
load are completely disconnected and the current consumption is
reduced to less than 1µA.
The PAM2803 is available in the 6-lead SOT23-6 package.
Features
LED Power Efficiency: up to 90%
Current Accuracy: 5%(V
IN
= 3.6V to 1.8V @V
F
= 3.7V)
Low Start-Up Voltage: 0.9V (I
LED
= 270mA)
Low Hold Voltage: 0.75 (I
LED
= 200mA)
1MHz Switching Frequency
Uses Small, Low Profile External Components
Low R
DS(ON)
: 100mΩ (typ)
Over Temperature Protection
Low Profile SOT23-6 Package
Pb-Free Package
Pin Assignments
Applications
White LED Torch (Flashlight)
White LED Camera Flash
DSC (Digital Still Camera) Flash
Cellular Camera Phone Flash
PDA Camera Flash
Camcorder Torch (Flashlight) Lamp
Typical Applications Circuit
I
LED
= 750mA, R
S
= 0.127Ω
Verzeichnis
- ・ Konfiguration des Pinbelegungsdiagramms on Seite 1 Seite 2 Seite 7
- ・ Abmessungen des Paketumrisses on Seite 8
- ・ Teilenummerierungssystem on Seite 7
- ・ Markierungsinformationen on Seite 7
- ・ Blockdiagramm on Seite 2
- ・ Typisches Anwendungsschaltbild on Seite 1
- ・ Technische Daten on Seite 2
- ・ Anwendungsbereich on Seite 1
- ・ Elektrische Spezifikation on Seite 3 Seite 4 Seite 5
