EVAL6902D STMicroelectronics, EVAL6902D Datasheet

EVAL6902D

Manufacturer Part Number

EVAL6902D

Description

EVAL BOARD FOR L6902 SERIES

Manufacturer

STMicroelectronics

Type

Battery Managementr

Datasheets

1.L6902D013TR.pdf (11 pages)

2.EVAL6902D.pdf (4 pages)

Specifications of EVAL6902D

Design Resources

EVAL6902D/L6902D Gerber Files

Main Purpose

Power Management, Battery Charger

Embedded

Utilized Ic / Part

L6902

Primary Attributes

8 ~ 25 Vin, 3.3V @ 1A Out

Secondary Attributes

Output Voltage of 1.3 ~ 10V Possible, Thermal Shutdown

Input Voltage

8 V to 25 V

Output Voltage

1.2 V to 10 V

Product

Power Management Modules

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

For Use With/related Products

L6902D

Other names

497-4746
EVAL6902D

Current page: 1 of 11
Download datasheet (198Kb)

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

Tape and reel

Packaging

L6902

Tube

www.st.com

1/11

Related parts for EVAL6902D

EVAL6902D 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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. ...

Related keywords

eval6924d
eval6563-80w
eval6235n
eval6229pd
eval6228qr
eval6207n
eval6206n
eval6205n
EVAL6902D datasheet
EVAL6902D data sheet
EVAL6902D pdf datasheet
EVAL6902D component
EVAL6902D part
EVAL6902D distributor
EVAL6902D RoHS
EVAL6902D datasheet download