ZXSC300E5TA Diodes Zetex, ZXSC300E5TA Datasheet

IC LED DRVR WHITE BCKLGT SOT23-5

ZXSC300E5TA

Manufacturer Part Number
ZXSC300E5TA
Description
IC LED DRVR WHITE BCKLGT SOT23-5
Manufacturer
Diodes Zetex
Type
Backlight, White LEDr
Datasheet

Specifications of ZXSC300E5TA

Constant Current
Yes
Topology
Step-Up (Boost)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Backlight, Flash/Torch
Type - Secondary
High Brightness LED (HBLED), White LED
Frequency
200kHz
Voltage - Supply
0.8 V ~ 8 V
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
3.6mA
Internal Switch(s)
Yes
Efficiency
94%
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Other names
ZXSC300E5TR

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Part Number:
ZXSC300E5TA
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SINGLE OR MULTI CELL LED DRIVER SOLUTION
DESCRIPTION
The ZXSC300 is a single or multi cell LED driver
designed for applications where step-up voltage
conversion from very low input voltages is required.
These applications mainly operate from single 1.5V or
1.2V battery cells. The circuit generates constant
current pulses that are ideal for driving single or
multiple LED’s over a wide range of operating voltages.
The ZXSC300 is a PFM controller IC that drives an
external Zetex switching transistor with a very low
saturation resistance. These transistors are the best
switching devices available for this type of switching
conversion enabling high efficiency conversion with
input voltages below 1 volt. The drive output of the
ZXSC controller generates a dynamic drive signal for
the switching transistor.
FEATURES
TYPICAL APPLICATION CIRCUIT
V
ISSUE 4 - SEPTEMBER 2007
BATT
94% efficiency
Minimum operating input voltage 0.8V
Fixed output current
Low saturation voltage switching transistor
SOT23-5 package
U1
ZXSC300
V
Gnd
V
I
cc
sense
drive
L1
100µH
Q1
FMMT617
R1
0.33R
LED1
WHITE LED
1
The circuit can start up under full load and operates
down to an input voltage of 0.8 volts. The solution
configuration ensures optimum efficiency over a wide
range of load currents, several circuit configurations
are possible depending on battery life versus
brightness considerations.
The ZXSC300 is offered in the SOT23-5 package which,
when combined with a SOT23 switching transistor,
generates a high efficiency small size circuit solution.
The IC and discrete combination offers the ultimate
cost vs performance solution for single cell LED driving
applications.
APPLICATIONS
ORDERING INFORMATION
DEVICE MARKING C300
Package SOT23-5
DEVICE
ZXSC300E5TA
LED flashlights and torches
LED backlights
White LED driving
Multiple LED driving
Solar Equipment
Reel
7”
Tapewidth
8mm
ZXSC300
Quantity
per reel
3,000

Related parts for ZXSC300E5TA

ZXSC300E5TA Summary of contents

Page 1

... APPLICATIONS • LED flashlights and torches • LED backlights • White LED driving • Multiple LED driving • Solar Equipment ORDERING INFORMATION DEVICE Reel ZXSC300E5TA 7” DEVICE MARKING C300 LED1 Package SOT23-5 WHITE LED 1 ZXSC300 Tapewidth Quantity per reel 8mm 3,000 ...

Page 2

ZXSC300 ABSOLUTE MAXIMUM RATING Supply Voltage -0.3 to 10V Maximum Voltage Other Pins -0 Power Dissipation 450mW ELECTRICAL CHARACTERISTICS: SYMBOL PARAMETER (1) η Efficiency V Recommended CC supply voltage range V Minimum startup CC(min) and operating voltage (2) ...

Page 3

FMMT617 For the circuits described in the applications section, Zetex FMMT617 is the recommended pass transistor. The following indicates outline data for the transistor, more detailed information can be found at www.zetex.com/FMMT617 ELECTRICAL CHARACTERISTICS (at T PARAMETER SYMBOL MIN. Collector-Emitter ...

Page 4

ZXSC300 TYPICAL CHARACTERISTICS ISSUE 4 - SEPTEMBER 2007 4 ...

Page 5

DEVICE DESCRIPTION The ZXSC300 is PFM, controller IC which, when combined with a high performance external transistor, enables the production of a high efficiency boost converter for use in single cell LED driving applications. A block diagram is shown for ...

Page 6

ZXSC300 REFERENCE DESIGNS Two typical LED driving applications are shown. Firstly a maximum brightness solution and secondly an optimised battery life solution. Maximum brightness solution This circuit provides a constant current output to the LED by rectifying the switching pulses. ...

Page 7

Maximum battery life solution To ensure optimum efficiency, and therefore maximum battery life, the LED is supplied with a pulsed current. Maximum efficiency is ensured with the removal of rectifier losses experienced in the maximum brightness solution BATT ...

Page 8

ZXSC300 APPLICATIONS INFORMATION The following section is a design guide for optimum converter performance. Switching transistor selection The choice of switching transistor has a major impact on the converter e fficiency optim um performance, a bipolar transistor with ...

Page 9

Output Power Calculation By making the above assumptions for inductance and peak current the output power can be determined by OUT IN PK MIN P x OFF OUT + ...

Page 10

ZXSC300 SUPPLIER LISTING Manufacturer EUROPE Zetex GmbH Zetex Germany Tel: (49) 894549490 URL: AVX UK AVX Tel: (44) 1252 770000 URL: Coilcraft Europe Coilcraft UK Tel: (44) 1236 730595 URL: Nichia Europe B.V. Nichia Corporation The Netherlands Tel: (31) 20 ...

Page 11

PACKAGE OUTLINE ISSUE 4 - SEPTEMBER 2007 PACKAGE DIMENSIONS Millimeters DIM MIN. MAX. A 0.90 1. 0.15 A2 0.90 1.30 b 0.20 0.50 C 0.09 0.26 D 2.70 3.10 E 2.20 3.20 E1 1.30 1.80 e 0.95 REF ...

Page 12

ZXSC300 Definitions Product change Zetex Semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. Customers are solely responsible for obtaining the latest relevant information before placing orders. Applications disclaimer ...

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