Datasheet L9466 Datasheet (ST)

Features

■ For air and liquid cooled applications

■ DF output (inverted field monitor)

■ Thermal protection

■ FIeld driver, lamp driver, relay driver, and DF

(field monitor) short circuit protected

■ Load response control

■ Single phase autostart

Description

The L9466 is a monolithic multifunction generator
Voltage regulator intended for use in automotive
charging applications.

Table 1. Device summary

L9466

Car alternator voltage regulator

Multiwatt8

This All Silicon Voltage Regulator regulates the
output of an automotive generator by controlling
the field winding current by means of a variable
frequency PWM high side driver.

Order code Package Packing

L9466N Multiwatt8 Tube

October 2008 Rev 2 1/11

www.st.com

11

Contents L9466

Contents

1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2/11

L9466 Block diagram

1 Block diagram

Figure 1. Block diagram

Key SW.

Fault

R

Relay

Lamp

L

ASVR

VGO

P

F+

Starter

Battery

Stator

To
ECM

DF

C

Field
(Rotor)

Rectifier
Bridge

Loads

3/11

Pin description L9466

2 Pin description

Table 2. Pin description

N° Pin Description

1V

Generator Output – Voltage Sense and Power Supply to ASVR

GO

2 F+ Field Driver - High Side Drive Output

3 G Ground for ASVR (Must be connected for Ground for ASVR)

4 NC Not connected

5 Gnd Internally connected to the Tab or Slug in MW-8.

6 DF Inverted Field Monitor Output

7 L Lamp - Low Side Driver; Relay - High Side Driver

8 P Phase Sense Input

Figure 2. Pin connection (top view)

8

7

6

5

4

3

2

1

P

L

DF

GND

NC

G

F+

V

GO

Tab connected to pin 5

4/11

D02AT502B

L9466 Electrical specifications

3 Electrical specifications

3.1 Absolute maximum ratings

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit

I

OC

P

Output current capability Internally limited

Power dissipation 6 W

tot

Short circuit protected

All terminal, to VGO

and ground

3.2 Thermal data

Table 4. Thermal data

Symbol Parameter Value Unit

T

T

R

th j-case

T

Junction temperature -40 to +150 °C

j

Storage temperature -50 to +150 °C

stg

Thermal shut-down 175 ± 15 °C

sd

Thermal resistance junction to case 1.5 °C/W

3.3 Electrical characteristics

Table 5. Electrical characteristics

Symbol Parameter Test condition Min. Typ. Max. Unit

(T

= -35°C to +150°C continuous unless otherwise specified)

case

V

V

OS

V

OS

I

SB

V

SP

V

NB

T

V

LR

V

SR

F-ON

Operating supply voltage T

Operating supply voltage T

= +25°C to =150°C8 VovV

case

= -40°C to +25°C10 VovV

case

V

= 12.6V; T

GO

case

= 25°C;

10kΩ; F+, G & Tab (Slug)

Stand-by current

Grounded; L, DF, & P
unconnected; Regulator not
activated.

Regulator set-point Curve shown in Figure 3

Generator output, no battery

Thermal compensation Voltage @ VGO Curve shown in Figure 3

C

No battery, I
Max. Load

= 2A to 50%

OUT

V

- 2

SP

Load regulation 6500 grpm, 10% to 95% load 300 mV

Speed regulation 15A load, 2000 to 20,000 grpm 100 mV

I

= 6A, VGO = 14.0V,

Output saturation voltage

T

F

case

= 25°C

5/11

300 μA

+

V

SP

2

750 mV

V

Electrical specifications L9466

Table 5. Electrical characteristics (continued)

(T

= -35°C to +150°C continuous unless otherwise specified)

case

Symbol Parameter Test condition Min. Typ. Max. Unit

= 5A, VGO = 13.5V,

I

V

F-ON

I

F-LIM

I

F-LIM

I

G-MIN

Output saturation voltage

Field limit current

Field limit current

(1)

(1)

Min. generator current load

F

= 125°C

T

case

Current F+ Terminal to Gnd.

case

≤ 25°C

@ T

Current F+ Terminal to Gnd.
@ T

= +150°C

case

Current measured @ generator
output

850 mV

9.0 A

6.0 A

0.5 A

V

I

F

V

I

DF-LK

F

TURBO

F

TURBO

1. The Field Drive capability shall not decrease as a function of temperature between 25°C and 150°C, at a rate faster than -

0.024A/°C (for example, Field Drive shall be capable of ≥7.2A at 100°C).

Field discharge diode IF = 6A, T

D-F

Diode reverse current VR = 20V 1 mA

D-R

Oscillation frequency During LRC operation 340 400 460 Hz

OSC

DF saturation voltage IDF ≤ 10mA 0.8 V

DF

= 25°C1.85V

case

DF output leakage current VDF < 25V 10 μA

Internal clock frequency VDF = 32 - 35V; at 2.2kΩ 4X Hz

IRD, SS, LRC Rate VDF = 32 - 35V; at 2.2kΩ÷ 16

Figure 3. Set-point voltage vs. mounting tab temperature

6/11

L9466 Electrical specifications

Table 6. Diagnostic (T

= -35°C to +150°C unless otherwise specified)

case

Symbol Parameter Conditions Min. Typ. Max. Units

V

+

V

V

V

L-SAT

V

L-SAT-BO

V

L-RLY

T

DELAY

1. This condition can happen when the connection between the battery and VGO or the output terminal of the generator is
broken. The 1.1 second delay is not required, and current is sinked by ASVR.

2. When no fault is detected the Lamp terminal is pulled up by ASVR.

Table 7. Fault indication table

Over-voltage VSP + 1

OV

Under-voltage FP > F

UV

Lamp ON saturation voltage IL = 0.5A (sinked by ASVR) >V

Lamp ON voltage

(1)

Lamp OFF (relay drive)
saturation voltage (vs. B+)

IL < 0.5A, VGO = Open; T

-35°C to 85°C

IL = 750mA (Sourced by ASVR)

(2)

T

case

0.95 1.8 V

P-LRC

L-ACT

=

case

< 125°C

Fault indication delay time Delay before Lamp ON 0.9 1.1 1.3 s

Conditions T

SP

1.3

+ 2 V

V

SP

1.33 1.45 V

3.8 5 V

1.85 V

Delay

Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec. ± 15% after initial KEY-ON) No

V

> V

GO

OV

< V

< F

P-F

P-TR

AND VGO < V

@ V

P-TR

SP

V

P

F

P

No Connection Between Battery and V

At Start: Lamp ON until F

Table 8.

Regulation features

P>FP-IR

AND VP>V

GO

. i.e. until VP reaches 8V. No

P-F

Ye s

Ye s

Ye s

No

Symbol Parameter Conditions Min. Typ. Max. Unit

V

I

L-PD

V

F

F

P-TR

IRD Initiate regulation delay

L terminal regulator activate

L-PD

threshold

L terminal pull down current

Initiate regulation phase voltage

P-IR

threshold

Phase terminal current sink

I

P

Initiate regulation phase

P-IR

frequency

Terminate regulation phase
frequency

VGO=12.6V 0.8 1 1.15 V

V

= V

L

VGO=12.6V

L-ACT

0.09 0.78 mA

Regulator Activated 1.1 1.3 1.5 V

V

> 1.5V and < 12.6V

P

VGO = 12.6V

0.25 3.5 mA

123 145 167 Hz

59 72 86 Hz

Regulator activated, V

Conditions Met First Time.

F

P-IR

P-IR

and

1.722.3s

7/11

Electrical specifications L9466

Table 8.

Regulation features

(continued)

Symbol Parameter Conditions Min. Typ. Max. Unit

Regulator activated AND

FSDC Field strobe duty cycle

(regulation terminated OR

16 18.75 22 %

regulation NOT initiated)

LRC Load response control rate Field drive duty cycle increase 8.5 10 11.5 %/s

F

P-LRC

SS Soft-start

LRC transition frequency LRC enabled if FP < F

LRC enabled until V

SP

regardless other conditions

P-LRC

reached

255 300 345 Hz

34 40 46 %/s

8/11

L9466 Package information

4 Package information

In order to meet environmental requirements, ST (also) offers these devices in ECOPACK®
packages. ECOPACK

®

packages are lead-free. The category of second Level Interconnect
is marked on the package and on the inner box label, in compliance with JEDEC Standard
JESD97. The maximum ratings related to soldering conditions are also marked on the inner
box label.

ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

Figure 4. Multiwatt8 mechanical data and package dimensions

DIM.

A50.197

B 2.65 0.104

C1.60.063

E 0.49 0.55 0.019 0.022

F 0.78 0.85 0.030 0.033

G 2.40 2.5 4 2.68 0.094 0.10 0.105

G1 17.64 17.78 17.92 0.69 0.70 0.71

H1 19.6 0.772

H2 20.2 0.795

L 20 .35 20.65 0.80 0.81

L2 17.05 17.20 17.35 0.67 0.68 0.68

L3 17.25 17 .5 17.75 0.679 0.689 0.699

L4 10.3 10.7 10.9 0.406 0.421 0.429

L7 2.65 2.9 0.104 0.114

S 1.9 2.6 0.075 0.102

S1 1.9 2.6 0.075 0.102

U 0.40 0.55 0.015 0.022

Z 0.70 0.85 0.028 0.034

Dia1 3.65 3.85 0.144 0.152

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

OUTLINE AND

MECHANICAL DATA

Multiwatt8 (Pin 5 GND)

0043696 F

9/11

Revision history L9466

5 Revision history

Table 9. Document revision history

Date Revision Changes

17-May-1994 1 Initial release.

Revalidation document.

21-Oct-2008 2

Document reformatted.
Updated Section 2: Pin description on page 4.

10/11

L9466

Please Read Carefully:

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.

Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.

No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.

UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.

UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.

Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.

ST and the ST logo are trademarks or registered trademarks of ST in various countries.

Information in this document supersedes and replaces all information previously supplied.

The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.

© 2008 STMicroelectronics - All rights reserved

STMicroelectronics group of companies

Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -

Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America

www.st.com

11/11