STEVAL-ILL010V1 STMicroelectronics, STEVAL-ILL010V1 Datasheet

BOARD EVAL BASED ON L6902

STEVAL-ILL010V1

Manufacturer Part Number
STEVAL-ILL010V1
Description
BOARD EVAL BASED ON L6902
Manufacturer
STMicroelectronics
Datasheets

Specifications of STEVAL-ILL010V1

Mfg Application Notes
L6902D AppNote
Design Resources
STEVAL-ILL010V1 Gerber Files STEVAL-ILL010V1 Schematic STEVAL-ILL010V1 Bill of Materials
Current - Output / Channel
350mA
Outputs And Type
1, Non-Isolated
Voltage - Output
20 V
Features
Dimmable
Voltage - Input
8 ~ 30V
Utilized Ic / Part
L6902
Description/function
LED Driver Evaluation Module
Product
Display Modules
Core Chip
L6902
Dimming Control Type
PWM / Analog
Development Tool Type
Hardware - Eval/Demo Board
Mcu Supported Families
L6902
Supported Devices
L6902
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
L6902
Other names
497-6411
STEVAL-ILL010V1
Features
Applications
Description
The L6902D is a complete and simple step down
switching regulator with adjustable current limit.
Based on a voltage mode structure it integrates a
current error amplifier to have a constant voltage
and constant current control.
By means of an on board current sense resistor
and the availability of the current sense pins (both
compatible to Vcc and for Cs- compatible with
GND too) a current limit programming is very
simple and accurate (±5%). Moreover constant
November 2010
Up to 1 A output current
Operating input voltage from 8 V to 36 V
Precise 3.3 V (±2%) reference voltage
5 % output current accuracy
Output voltage adjustable from 1.235 V to 34 V
250 kHz internally fixed frequency
Voltage feedforward
Zero load current operation
Adjustable current limit
Protection against feedback Disconnection
Thermal shutdown
Chargers for NiCd, NiMH batteries and
preregulator for lithium-ion batteries
Adjustable current generator
Simple step-down converters with adjustable
current limit
Battery equipped systems
Distributed power supply
Mobile PC and subnotebook
Up to 1 A switching regulator with adjustable current limit
Doc ID 7332 Rev 9
current control can be used to charge NiMH and
NiCd batteries.
The device can be used as a standard DC/DC
converter with adjustable current limit (set by
using the external sense resistor).
The internal robust P-channel DMOS transistor
with a typical of 250 mΩ assures high efficiency
and a minimum dropout even at high output
current level. The internal limiting current (latched
function) of typical value of 2.5 A protects the
device from accidental output short circuit
avoiding dangerous loads damage.
If the temperature of the chip goes higher than a
fixed internal threshold (150°C with 20°C
hysteresis), the power stage is turned off.
Other protections beside thermal shutdown
complete the device for a safe and reliable
application: overvoltage protection, frequency
folback overcurrent protection and protection vs.
feedback disconnection.
The internal fixed switching frequency of 250KHz,
and the SO-8 package pin allow to built an ultra
compact DC/ DC converter with a minimum board
space.
Table 1.
L6902D013TR
Order codes
L6902D
Device summary
Package
SO-8
SO-8
Tape and reel
Packaging
L6902
Tube
www.st.com
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STEVAL-ILL010V1 Summary of contents

Page 1

switching regulator with adjustable current limit Features ■ output current ■ Operating input voltage from ■ Precise 3.3 V (±2%) reference voltage ■ output current ...

Page 2

Content Content 1 Test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

L6902 1 Test and application circuit Figure 1. Test and application circuit 2 Pin connection Figure 2. Pin connection Table 2. Pin description N° Pin 1 OUT Regular output 2 CS+ Current error amplifier input (current sense at higher voltage) ...

Page 4

Maximum ratings 3 Maximum ratings Table 3. Absolute maximum ratings Symbol V Input voltage 8 Output DC voltage output peak voltage 0.1 μ Maximum output current Analog pins 4 5 ...

Page 5

L6902 4 Internal block diagram Figure 3. Block diagram Doc ID 7332 Rev 9 Internal block diagram 5/11 ...

Page 6

Electrical characteristics 5 Electrical characteristics T = 25° 12V, unless otherwise specified Table 5. Electrical characteristics Symbol Parameter V Operating input voltage range Dropout voltage d I Operating charging current O I Maximum ...

Page 7

L6902 Table 5. Electrical characteristics (continued) Symbol Parameter Reference section Reference voltage Line regulation Load regulation Short circuit current 1. Specification Referred to TJ from -40 to 125°C. Specification over the -40 to +125 TJ Temperature range are assured by ...

Page 8

Package mechanical data 6 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available ...

Page 9

L6902 Figure 4. Package dimensions Doc ID 7332 Rev 9 Package mechanical data 9/11 ...

Page 10

Revision history 7 Revision history Table 6. Document revision history Date January 2004 October 2004 26-Nov-2010 10/11 Revision 7 Technical migration from ST-PRESS to EDOCS. 8 Changed style look and feel. 9 Updated Note 1 on page 7 Doc ID ...

Page 11

... L6902 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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