SD414-100 Fairchild Semiconductor, SD414-100 Datasheet

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SD414-100

Manufacturer Part Number
SD414-100
Description
High Efficiency Serial LED Driver with 30V Integrated Switch
Manufacturer
Fairchild Semiconductor
Datasheet
©2005 Fairchild Semiconductor Corporation
FAN5330 Rev. 1.0.1
FAN5330
High Efficiency Serial LED Driver with 30V Integrated
Switch
Features
■ 1.5MHz Switching Frequency
■ Low Noise
■ Adjustable Output Voltage
■ 0.7W Output Power Capability
■ Low Shutdown Current: <1µA
■ Cycle-by-Cycle Current Limit
■ Low Feedback Voltage (110mV)
■ Over-Voltage Protection
■ Fixed-Frequency PWM Operation
■ Internal Compensation
■ Thermal Shutdown
■ 5-Lead SOT23 Package
Applications
■ Cell Phones
■ PDAs
■ Handheld Equipment
■ Display Bias
■ LED Bias
Typical Application
V
IN
ON
C
2.2 F
IN
OFF
Figure 1. Typical Application Diagram
5
4
V
SHDN
IN
H to 10 H
L
GND
FB
SW
1
1
3
2
Description
The FAN5330 is an LED driver that features fixed frequency
mode operation and an integrated FET switch. This device is
designed to operate at high switching frequencies in order to
minimize switching noise measured at the battery terminal of
hand-held communications equipment. Quiescent current in
both normal and shutdown mode is designed to be minimal in
order to extend battery life. Normal or shutdown mode can be
selected by a logic level shutdown circuitry.
The low ON-resistance of the internal N-channel switch ensures
high efficiency and low power dissipation. A cycle-by-cycle cur-
rent limit circuit keeps the peak current of the switch below a
typical value of 1.5A. The FAN5330 is available in a 5-lead
SOT23 package.
BAT54
0.47 F
C
I
OUT
LED
R
V
OUT
www.fairchildsemi.com
August 2005

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SD414-100 Summary of contents

Page 1

... Typical Application 2 ©2005 Fairchild Semiconductor Corporation FAN5330 Rev. 1.0.1 Description The FAN5330 is an LED driver that features fixed frequency mode operation and an integrated FET switch. This device is designed to operate at high switching frequencies in order to minimize switching noise measured at the battery terminal of hand-held communications equipment ...

Page 2

Pin Assignment Pin Description Pin No. Pin Name GND SHDN FAN5330 Rev. 1.0.1 Top View GND FB SHDN 5-Lead SOT-23 Figure 2. Pin Assignment Pin Description Switching Node. ...

Page 3

Absolute Maximum Ratings ( V to GND IN FB, SHDN to GND SW to GND Lead Soldering Temperature (10 seconds) Junction Temperature Storage Temperature Thermal Resistance ( ) JA Electrostatic Discharge Protection (ESD) Level (Note 2) Recommended Operating Conditions Parameter ...

Page 4

Electrical Characteristics Unless otherwise noted 3.6V Circuit, Figure 3. Parameter Feedback Voltage Switch Current Limit Load Current Capability Switch On-resistance Quiescent Current OFF Mode Current Shutdown Threshold Shutdown Pin Bias Current Feedback Pin Bias Current Feedback ...

Page 5

Typical Performance Characteristics T = 25° 4.7µ OUT LED Current vs Temperature 10.6 10.4 10 3.6V IN 10.0 9.8 9.6 -40 - ...

Page 6

Block Diagram SHDN 4 Shutdown Circuitry FB 3 Reference Circuit Description The FAN5330 is a pulse-width modulated (PWM) current-mode boost converter. The FAN5330 improves the performance of bat- tery powered equipment by significantly minimizing the spectral distribution of noise at ...

Page 7

... TDK SLF6025&-100M1R0 10µH MURATA LQH66SN100M01C 10µH COOPER SD414-100 Table 1: Recommended Inductors Capacitors Selection For best performance, low ESR input and output capacitors are required. Ceramic capacitors 4.7µF and C IN placed close to the IC pins, are required for optimum perfor- mance. The capacitances (C ) may be reduced to 0.1µ ...

Page 8

Dimming Using Filtered PWM Signal This method allows the use of a greater than 1kHz PWM fre- quency signal with minimum impact on the battery ripple. The filtered PWM signal Table 8 on page 8 acts as an adjustable ...

Page 9

Mechanical Dimensions 5-Lead SOT-23 Symbol Inches Min Max A .035 .057 A1 .000 .006 B .008 .020 c .003 .010 D .106 .122 E .059 .071 e .037 BSC e1 .075 BSC H .087 .126 L .004 .024 0º 10º ...

Page 10

... TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ACEx™ FAST ActiveArray™ FASTr™ Bottomless™ FPS™ Build it Now™ FRFET™ CoolFET™ ...

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