L6377D

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) Block diagram VS SO-14 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 Package SO-14 SO-14 Packaging Tube Tape and reel Order codes L6377D L6377D013TR Figure 1. CHARGE PUMP VS RS GND IN+ + 1.3V CURRENT LIMIT DRIVER OVC OUT UV R 1.3V + - SHORT CIRCUIT CONTROL RSC DIAG OVT UV DELAY ON DELAY C DON D94IN075D March 2008 Rev 4 1/16 www.st.com 16 Contents L6377 Contents 1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 1.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 3 4 5 6 7 8 9 10 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Over temperature protection (OVT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Under voltage protection (UV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Over current operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Demagnetisation of inductive loads . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2/16 L6377 Maximum rating 1 1.1 Maximum rating Absolute maximum ratings Table 2. Symbol Vs Vs - Vout Vod Iod IRESET VRESET Iout Vout Eil Absolute maximum ratings Pin 4 Parameter Supply voltage (tw ≤ 10 ms) Supply voltage (DC) 4 vs 3 Supply to output differential voltage Externally forced voltage 10 Externally forced current Reset input current (forced) 5 Reset input voltage Output current (see also Isc) 3 Output voltage Total energy inductive load (TJ = 125 °C) Power dissipation External voltage 11 Externally forced current Input current 12 Input voltage Ambient temperature, operating range Junction temperature, operating range (see overtemperature protection) Storage temperature -10 to Vs +0.3 -25 to 85 -25 to 125 -55 to 150 V °C °C °C -10 to 10 20 mA mA -0.3 to 40 internally limited internally limited 50 internally limited -0.3 to 40 V mJ V Value 50 40 internally limited -0.3 to 7 ±1 ±2 V mA mA Unit V V Ptot Vdiag Idiag Ii Vi Top TJ Tstg 1.2 Thermal data Table 3. Symbol RthJA Thermal data Parameter Thermal resistance, junction to ambient (max) Value 150 Unit °C/W 3/16 Pin connections L6377 2 Pin connections Figure 2. Pin connections (top view) N.C. GND OUT VS RSC N.C. N.C. 1 2 3 4 5 6 7 D96IN368 14 13 12 11 10 9 8 N.C. RESET IN+ DIAG ON DELAY N.C. N.C. Table 4. N# 1, 6, 7, 8, 9, 14 2 3 4 5 10 11 12 13 Pin description Pin name N.C. GND OUT VS Function Not connected Ground pin High side output. Controlled output with current limitation Supply voltage. Range with under voltage monitoring Current limiting setting Rsc ON DELAY Delay setting for overcurrent diagnostic DIAG IN+ RESET Diagnostic open drain output for over temperature, under voltage and overcurrent Comparator non inverting input Asynchronous reset input 4/16 L6377 Electrical characteristics 3 Electrical characteristics Table 5. Electrical characteristcs (Vs = 24 V; TJ = -25 to 125 °C; unless otherwise specified.) Parameter Test condition Min Typ Max Unit Symbol Pin DC operation Vsmin Vs Vsth Vshys Iq Iqo Vith Viths Vil Vih 12 4 Supply voltage for valid diagnostic Operative supply voltage Under voltage lower threshold Under voltage hysteresis Quiescent current Quiescent current Input threshold voltage Input threshold hysteresis Input low level voltage Input high level voltage Idiag ≥ 0.5 mA; Vdiag = 1.5 V; 4 8 7 300 500 800 1.6 0.8 50 -7 1.3 24 35 35 8 700 V V V mV µA mA Output open Output on 2 400 0.8 Vs-3 15 250 V mV V V V µA V V V µA µA V V s < 18 V Vs > 18 V 2 2 -250 0.8 0 2 5 1.3 Iib Vrth Vrl Vrh Irb Idch Vrsc Irsc Idlkg Vdiag 11 10 13 Input bias current Reset threshold voltage Reset low level voltage Reset high level voltage Reset pull down current Delay capacitor charging current Output voltage on Rsc pin Output current on Rsc pin Diagnostic output leakage current Diagnostic output voltage drop Vi = -7 to 15 V 2 0.8 40 ON delay pin shorted to Ground Rsc pin floating Rsc pin shorted to GND Diagnostic off Idiag = 5 mA; 2.5 1.25 300 25 1.5 5 µA µA V 5/16 Electrical characteristics Table 5. Electrical characteristcs (continued) (Vs = 24 V; TJ = -25 to 125 °C; unless otherwise specified.) Parameter Output voltage drop Test condition Iout = 625 mA; TJ = 25 °C Iout = 625 mA; TJ = 125 °C Iolk Vol Vcl 3 Output leakage current Output low state voltage Vi = LOW; Vout = 0 Vi = HIGH; pin floating 48 0.8 53 5/Rsc = KΩ 0.75 1.1 150 20 1.5 Min Typ 250 400 Max 350 550 100 1.5 58 L6377 Symbol Pin Vdon Unit mV mV µA V V A A °C °C Internal voltage clamp (Vs- Io = 200 mA Vout) single pulsed =300ms Vs = 8 to 35 V; Rl = 2 Ω; Rsc = 5 to 30 KΩ Vs = 8 to 35 V; Rl = 2 Ω; Rsc < 5 KΩ Isc Short circuit output current Tmax Thys AC operation tr-tf td Over temperature upper threshold Over temperature hysteresis 3 Rise or fall time Delay time Slew rate (rise and fall edge) Vs = 24 V; Rl = 70 Ω Rl to ground Vs = 24 V; Rl = 70 Ω Rl to ground 50 pF < CDON< 2 nF 20 5 0.7 1 1.28 64 25 1.5 µs µs V/µs µs/pF tON kHz dV/dt tON tOFF fmax 10 On time during short circuit condition Off time during short circuit condition Maximum operating frequency Source drain NDMOS diode Vfsd Ifp trr tfr Forward on voltage Forward peak current Reverse recovery time Forward recovery time Ifsd = 625 mA tp = 10 ms; duty cycle = 20 % Ifsd = 500 mA; dIfsd/dt = 25 A/µs 200 50 1 1.5 1.5 V A ns ns 6/16 L6377 Figure 3. Undervoltage comparator hysteresis Electrical characteristics Vshys Vsth D94IN126A Vs Figure 4. Switching waveforms Vin 50% 50% td Vout 90% 50% td t 90% 50% 10% tr tf 10% D94IN127A t 7/16 Input section L6377 4 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. Normal operation is resumed as the chip temperature (normally after few seconds) falls below Tmax-Thys = 130 °C (typical value). The hysteresis avoid thats an intermittent behaviour take place. 6 Under voltage protection (UV) The supply voltage is expected to range from 8 to 35 V. In this range the device operates correctly. Below 8V the overall system has to be considered not reliable. To avoid any misfunctioning the supply voltage is continuously monitored to provide an under voltage protection. As Vs falls below Vsth-Vshys (typically 7.5 V, see fig. 4) the output power MOS is switched off and DIAG output goes LOW. Normal operation is resumed as soon as Vs exceeds Vsth. The hysteretic behaviour prevents intermittent operation at low supply voltage. 8/16 L6377 Over current operation 7 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). 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 = 1.28 µs/pF for 50 pF < CDON < 2 nF After the ton interval has expired the output power MOS is switched off for the tOFF time interval with: tOFF = 64*tON. Figure 5. OUTPUT CURRENT Isc Iout Short circuit operation waveforms t