Datasheet

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March 2008 Rev 4 1/16

L6377

0.5 A high-side driver quad intelligent power switch

Features

■ Multipower BCD technology

■ 0.5 A output current

■ 8 to 35 V supply voltage range

■ Externally programmable current limit

■ Non-dissipative over-current protection

■ Thermal shutdown

■ Under voltage lockout with hysteresys

■ Diagnostic output for under voltage, over

temperature and over current

■ External asynchronous reset input

■ Presettable delay for overcurrent diagnostic

■ Open ground protection

■ Protection against surge transient

(IEC 61000-4-5)

■ Immunity against burst transient

(IEC 61000-4-4)

Description

This device is a monolithic intelligent power switch

in multipower BCD technology for driving

inductive, capacitive or resistive loads.

Diagnostic for CPU feedback and extensive use of

electrical protections make this device inherently

indistructible and suitable for general purpose

industrial applications.

Table 1. Device summary

Order codes Package Packaging

L6377D SO-14 Tube

L6377D013TR SO-14 Tape and reel

SO-14

Figure 1. Block diagram

DRIVER

OVC

IN+

DIAG

OVT

ON DELAY

DON

OUT

GND

SHORT CIRCUIT

CONTROL

DELAY

CURRENT

LIMIT

CHARGE

PUMP

D94IN075D

-1.3V

1.3V

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Summary of content (16 pages)

PAGE 1
L6377 0.5 A high-side driver quad intelligent power switch Features ■ Multipower BCD technology ■ 0.
PAGE 2
Contents L6377 Contents 1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . .
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L6377 Maximum rating 1 Maximum rating 1.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Pin Vs 4 Vs - Vout Vod 3 Supply voltage (DC) 40 V internally limited Externally forced voltage -0.3 to 7 V Externally forced current ±1 mA Reset input current (forced) ±2 mA -0.3 to 40 V Output current (see also Isc) internally limited Output voltage internally limited 50 mJ Power dissipation internally limited External voltage -0.
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Pin connections 2 L6377 Pin connections Figure 2. Pin connections (top view) N.C. 1 14 N.C. GND 2 13 RESET OUT 3 12 IN+ VS 4 11 DIAG RSC 5 10 ON DELAY N.C. 6 9 N.C. N.C. 7 8 N.C. D96IN368 Table 4. N# Pin name 1, 6, 7, 8, 9, 14 N.C. Not connected 2 GND Ground pin 3 OUT High side output. Controlled output with current limitation 4 VS 5 Rsc 10 4/16 Pin description Function Supply voltage.
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L6377 3 Electrical characteristics Electrical characteristics Table 5. Electrical characteristcs (Vs = 24 V; TJ = -25 to 125 °C; unless otherwise specified.) Symbol Pin Parameter Test condition Min Typ Max Unit 35 V 35 V 8 V 700 mV DC operation Supply voltage for valid diagnostic Vsmin Vs Vsth 4 Vshys Idiag ≥ 0.5 mA; Vdiag = 1.
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Electrical characteristics Table 5. L6377 Electrical characteristcs (continued) (Vs = 24 V; TJ = -25 to 125 °C; unless otherwise specified.) Symbol Pin Parameter Output voltage drop Vdon Test condition Typ Max Unit Iout = 625 mA; TJ = 25 °C 250 350 mV Iout = 625 mA; TJ = 125 °C 400 550 mV 100 µA 0.8 1.
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L6377 Electrical characteristics Figure 3. Undervoltage comparator hysteresis Vshys Vsth Figure 4.
PAGE 8
Input section 4 L6377 Input section An Input and Asynchronous RESET, both TTL/CMOS compatible with wide voltage range and high noise immunity (thanks to a built in hysteresis) are available. 5 Over temperature protection (OVT) An on-chip Over Temperature Protection provides an excellent protection of the device in extreme conditions. Whenever the temperature - measured on a central portion of the chipexceeds Tmax =150 °C (typical value) the device is shut off, and the DIAG output goes LOW.
PAGE 9
L6377 7 Over current operation Over current operation In order to implement a short circuit protection the output power MOS is driven in linear mode to limit the output current to the Isc value. This Isc limit is externally settable by means of an external 1/4 W resistor connected from Rsc pin and GND. The value of the resistor must be chosen according to the following formula: Isc (A) = 5/Rsc (kΩ) with 5 < Rsc < 30 (kΩ) For Rsc < 5 (kΩ) Isc is limited to Isc = 1.1 A (typical value).
PAGE 10
Over current operation L6377 When also the tOFF interval has expired, the output power MOS is switched ON. Now two conditions may occur ● the overload is still present. In this case the output power MOS is again driven in linear mode (limiting the output current to Isc) for another tON, starting a new cycle, or ● the overload condition is removed, and the output power MOS is no longer driven in linear mode. All these occurrences are presented on the DIAG pin (see fig 5).
PAGE 11
L6377 8 Demagnetisation of inductive loads Demagnetisation of inductive loads The L6377 has an internal clamping zener diode able to demagnetise inductive loads. Note that the limitation comes from the peak power that the package can handle. Attention must be paid to a proper thermal design of the board.
PAGE 12
Demagnetisation of inductive loads Figure 8.
PAGE 13
L6377 9 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect . 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.
PAGE 14
Package mechanical data Table 6. L6377 SO-14 mechanical data mm inch Dim. Min Typ A a1 Max Typ 1.75 0.1 0.25 a2 Max 0.069 0.004 0.009 1.6 0.063 b 0.35 0.46 0.014 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.020 c1 45° (typ.) D (1) 8.55 8.75 0.336 0.344 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 F (1) 3.8 4 0.150 0.157 G 4.6 5.3 0.181 0.209 L 0.4 1.27 0.016 0.050 M 0.68 S Figure 9. 14/16 Min 8° (max.) Package dimensions 0.
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L6377 10 Revision history Revision history Table 7.
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L6377 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.