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December 2011 Doc ID 12603 Rev 8 1/17

L6375S

0.5 A high-side driver intelligent power switch

Features

■ 0.5 A output current

■ 8 V to 35 V supply voltage range

■ Internal current limiting

■ Thermal shutdown

■ Open ground protection

■ Internal negative voltage clamping for fast

demagnetization

■ Differential inputs with large common mode

range and threshold hysteresis

■ Undervoltage lockout with hysteresis

■ Open load detection

■ Two diagnostic outputs

■ Output status LED driver

■ Non-dissipative short-circuit protection

■ Immunity against burst transient

(IEC 61000-4-4)

■ ESD protection (human body model ±2 kV)

Description

The L6375S is a monolithic intelligent power

switch in BCDmultipower technology, for driving

inductive or resistive loads with controlled output

voltage slew rate and short-circuit protection.

An internal clamping diode enables the fast

demagnetization of inductive loads. Diagnostics

for CPU feedback and extensive use of electrical

protection make this device extremely rugged and

specially suitable for industrial automation

applications.

SO-8

Table 1. Device summary

Order codes Op. temp. range Package Packaging

L6375S

-25 to +125 °C SO-8

Tu be

L6375STR Tape and reel

www.st.com

Summary of content (17 pages)

PAGE 1
L6375S 0.5 A high-side driver intelligent power switch Features ■ 0.
PAGE 2
Contents L6375S Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Thermal data . . . . . . . . . . . . . . . . . . . .
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L6375S 1 Block diagram and pin description Block diagram and pin description Figure 1.
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Block diagram and pin description Figure 2. L6375S Pin connection (top view) SO-8 1.1 Pin description Table 2. 4/17 Pin description Pin n° Pin name 1 GND Ground 2 OUT High side output with built-in current limitation 3 VS Supply voltage input; the value of the supply voltage is monitored to detect undervoltage condition 4 Output status This current source output is capable of driving an LED to signal the status of the output pin.
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L6375S Electrical specifications 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Value Unit VS Supply voltage (tw < 10 ms) 50 V VS Supply voltage (DC) 40 V Internally limited V VS -Vout Supply to output differential voltage Vod Externally forced voltage -0.
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Electrical specifications 2.3 L6375S Electrical characteristics VS = 24 V; TJ = –25 to +125 °C, unless otherwise specified. Table 5. Symbol Vsmin Parameter Test condition Supply voltage for valid diagnostic Idiag = > 0.5 mA; Vdiag = 1.5 V; Min. Typ. 4 Max. Unit 35 V VS Operative supply voltage 8 24 35 V Vsth1 Undervoltage threshold 1 7 7.5 8 V Vsth2 Undervoltage threshold 2 6.5 7 7.
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L6375S Electrical specifications Table 5. Symbol Electrical characteristics (continued) Parameter Test condition Min. Typ. Max. Unit 1.5 3 V 25 µA Vosd Active output status driver drop VS – VOS; IOS = 2 mA TA = 0 to +85 °C voltage Ioslk Output status driver leakage current Vout < Voth2; VOS = 0 V VS = 18 to 35 V Vdgl Diagnostic drop voltage D1 / D2 = L; Idiag = 0.5 mA D1 / D2 = L; Idiag = 3 mA Idglk Diagnostic leakage current D1 / D2 = H; 0 < Vdg < VS VS = 15.
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Electrical specifications 2.4 Switching waveform Figure 3. 2.5 L6375S Switching waveform Input section An single ended input TTL/CMOS compatible with a wide voltage range and high noise immunity (thanks to a built-in hysteresis) is available. 2.6 Overtemperature protection (OVT) An on-chip overtemperature protection provides excellent protection of the device in extreme conditions.
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L6375S 2.8 Electrical specifications Overcurrent operation In order to implement a short-circuit protection the output Power MOSFET is driven in linear mode to limit the output current to the Isc (1.1 A typical value). This condition (current limited to the Isc value) lasts for a Ton time interval, that can be set by means of a capacitor (Cdon) connected to the ON DELAY pin according to the following formula: Ton = 1.
PAGE 10
Electrical specifications 2.9 L6375S Diagnostic logic The operating conditions of the device are permanently monitored and the following occurrences are signalled via the DIAG1/DIAG2 open-drain output pins, see Table 6: Diagnostic truth table. 2.10 ● Short-circuit vs. ground ● Short-circuit vs. VS ● Undervoltage (UV) ● Overtemperature (OVT) ● Open load, if the output current is less than 3 mA (typical value).
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L6375S 3 Application circuits Application circuits Figure 5. Inductive load equivalent circuit Figure 6. External demagnetization circuit (vs.
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Application circuits L6375S Figure 7. External demagnetization circuit (vs. VS) Figure 8.
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L6375S 4 Package mechanical data 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 at: www.st.com. ECOPACK is an ST trademark.
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Package mechanical data Table 7. L6375S SO-8 mechanical data mm inch Dim. Min. Typ. A a1 Max. Typ. 1.75 0.1 Max. 0.068 0.25 a2 0.003 0.009 1.65 0.064 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.019 c1 45 (typ.) D 4.8 5.0 0.188 0.196 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4.0 0.14 0.157 L 0.4 1.27 0.015 0.050 M 0.6 S Figure 9. 14/17 Min. 0.023 8º (max.
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L6375S Package mechanical data Figure 10.
PAGE 16
Revision history 5 L6375S Revision history Table 8.
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L6375S 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.