IC-JE

iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 1/9 FEATURES o Wide operating voltage range of 10 to 45 Vdc o PWM control for coil currents of 40 to 300 mA o Coil current for energise and hold modes set by an external resistor o Coil current monitored during energise mode, detection of load breakage and voltage errors o Automatic current reduction after 100 ms to reduce the power consumption in hold mode o The internal free-wheeling alteration function supports PWM operation and quick demagnetising during shutdown o Status signalled at the current-limited LED output o Shutdown with excessive temperature and low voltage o Integrated oscillator needs no external components o PWM frequency is beyond audible range o Protective circuitry against damage by ESD o Minimum space requirements, few external components APPLICATIONS o PWM drive for inductive loads (e.g. relays, electrovalves) o Relay low-/high-side switch PACKAGES SO8 PDIP8 BLOCK DIAGRAM 10...45 V LOW VOLTAGE THERMAL SHUTDOWN ERR TURN−ON CURRENT CONTROL EN PWMOK HOLD MODE DELAY START t >= 100 ms TURN−ON RESET t = 25 us HOLD DRIVER OUTPUT VB 8 INI 1 LED MUX HOLD ON 2.4 Hz OFF 15 V SQ R LOUT 0.01...10 H OUT I V −+ 7 3 IN INI INPUT REFERENCE x1.0 x0.66 + − 0 MUX 1 PWM CONTROL GND 6 80 kHz PWMOK iC−JE ISET 2 1.2 V RSET 10...60 k Ω GND Copyright © 2007 iC-Haus http://www.ichaus.com iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 2/9 DESCRIPTION iC-JE is a PWM driver for inductive loads, such as relay coils, solenoid valves and small DC motors. The setpoint for the coil current is preset with the help of the RSET external resistor. 60 to 300 mA can be set for energise mode which then automatically drop to 2/3 of this value (40 to 200 mA) during hold mode. The device is switched to hold mode after 100 ms provided that the set coil current is obtained during energising (PWMOK = 1). The changeover between energise and hold modes is suitable for typical relay drives which require a powerful initial energising current which can then be reduced after closing the air gap in a magnetic circuit. The quadratic dependence on the current intensity means that the power dissipation of the system is more than halved through this reduction. The output current is measured with zero loss at the power transistor’s ON resistance and compared to the setpoint. In order to maintain this setpoint, the switch-on time of the coil driver is modulated by the pulse width. The internal flyback diode maintains the current during the switching pauses. The switching frequency of ca. 80 kHz is provided by the internal oscillator. The device is shutdown by a Low signal at input IN or the removal of the power supply; the current reduction in the coil is supported by the changeover of the free-wheeling circuit. The Zener diode now active permits higher free-wheeling voltages and thus a quicker demagnetising of the coil. The status indicator LED is constantly ON when hold mode is functioning correctly and flashes with low voltage, excessive temperature or when the coil current in energise mode has not reached the setpoint. The driver output is shutdown with low voltage or excessive temperature. The device is protected against destruction by ESD. PACKAGES SO8, PDIP8 to JEDEC PIN CONFIGURATION SO8 (top view) LED ISET IN n.c. 1 8 PIN FUNCTIONS No. Name Function VB OUT GND n.c. 1 LED 2 ISET 3 4 5 6 7 8 IN n.c. n.c. GND OUT VB 2 3 4 7 6 5 State monitor PWM Reference Current (setpoint adjustment) Input PIN CONFIGURATION PDIP8 (top view) 1 LED ISET IN n.c. iC−JE Code ... ... ...yyww Ground PWM Output +10 to 45 V Supply Voltage VB OUT GND n.c. iC−JE Code ... ... ...yyww iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 3/9 ABSOLUTE MAXIMUM RATINGS Beyond these values damage may occur; device operation is not guaranteed. Item No. Symbol Parameter Voltage at VB Current in VB Voltage at OUT Output Current in OUT Voltage at LED Current in LED Voltage at ISET Current in ISET Voltage at IN Current in IN Junction Temperature Storage Temperature Conditions Fig. Min. -0.3 -350 -0.3 -6 -0.3 -6 -0.3 -6 -0.3 -6 -40 -40 Max. 48 6 60 350 VB 8 48 6 48 6 150 150 V mA V mA V mA V mA V mA °C °C Unit G001 V(VB) G002 I(VB) G003 V(OUT) G004 I(OUT) G005 V(LED) G006 I(LED) G007 V(ISET) G008 I(ISET) G009 V(IN) G010 I(IN) G011 Tj G012 Ts THERMAL DATA Operating Conditions: VB = 10...45 V, LOUT = 0.01...10 H, RSET = 10...60 kΩ Item No. T01 T02 T03 Symbol Ta Rthja Rthja Parameter Operating Ambient Temperature Range Thermal Resistance Chip/Ambient Thermal Resistance Chip/Ambient PDIP8 package SO8 package Conditions Fig. Min. -25 Typ. Max. 80 110 140 °C K/W K/W Unit All voltages are referenced to ground unless otherwise stated. All currents into the device pins are positive; all currents out of the device pins are negative. iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 4/9 ELECTRICAL CHARACTERISTICS Operating Conditions: VB = 10...45 V, LOUT = 0.01...10 H, RSET = 10...60 kΩ, Tj = -25...125 °C, unless otherwise noted. LED connected or pin LED linked to GND (via ca. 500 Ω resistor or capacitor). Item No. 001 002 003 004 005 006 007 Symbol Parameter Conditions Tj °C Fig. Min. 10 Outputs OUT, LED disabled Output OUT enabled I() = -4 mA, other Pins open I(OUT) = 4 mA, other Pins open Vc()hi = V(LED) − V(VB); I(LED) = 4 mA, other Pins open I(OUT) = 200 mA I(OUT) = 300 mA Increased Energising Current by RC-circuit at ISET, Hold Current 200 mA max. 104 105 106 107 108 109 110 111 201 202 203 204 205 206 207 208 209 210 PWMthi Isc() Vc()hi Vc()hi Vc()off IIK() twon()min C() Vt()on Vt()off Vt()hys lpd() Rpd() Permissible Hold Current Short-circuit Current Clamp Voltage hi at PWM-Free-Wheeling Clamp Voltage hi at PWM-Free-Wheeling Clamp Voltage hi at Turn-off Leakage Current Permissible Load Capacitance Threshold Voltage hi Threshold Voltage lo Hysteresis Pull-down Current Pull-down Resistor Vt()hys = Vt()on − Vt()off V(IN) = 4...45 V V(IN) = 0...4 V IN: lo → hi IN: hi → lo IN = VB, VB = VBoff → VBon PWMOK = 1 before tpPMWlo PWMOK = 0 65 130 100 200 2.6 1.7 0.7 50 20 2.85 2.0 0.85 100 50 V(OUT) = VB Vc()hi = V(OUT) − VB; IN = hi, I(OUT) = 200 mA Vc()hi = V(OUT) − VB; IN = hi, I(OUT) = 300 mA Vc()hi = V(OUT) − VB; IN: hi → lo, I(OUT) = 200 mA IN = lo, V(OUT) = 0...VB 1 250 1 1 1 12 1 1 1 5, 6 0.5 0.5 -1.4 48 60 0.3 57 71 1.4 Typ. Max. 45 2 3 -0.3 V mA mA V V V V Unit Total Device VB I(VB) I(VB) Vc()lo Vc()hi Vc()hi Vc()hi Permissible Supply Voltage Range Supply Current in VB Supply Current in VB Clamp Voltage lo at all Pins Clamp Voltage hi at OUT Clamp Voltage hi at LED vs. VB Clamp Voltage hi at VB, IN, ISET I() = 4 mA, other Pins open Driver Output OUT 101 102 103 Vs()lo Vs()lo PWMthi Saturation Voltage lo Saturation Voltage lo Permissible Energising Current 360 550 600 850 300 350 mV mV mA mA 1 40 0.6 1 1 1.4 15 1 1.7 1.5 2 17 10 1000 1 3.2 2.3 1.1 200 80 20 10 40 135 270 mA A V V V µA ns nF V V V µA kΩ µs µs µs ms ms Minimum PWM Turn-on Duration IN = hi, ISET open Input IN tp(IN-OUT) Turn-on Delay tp(IN-OUT) Turn-off Delay tp(VBOUT) Turn-on Delay when VB is powered up tp(IN-LED) Delay Time from IN to LED (with light permanently on) tp(IN-LED) Delay Time from IN to LED (with light flashing) Ipd() Vs()lo Ipu() VBlo VBon VBoff VBhys Toff Pull-down Current Saturation Voltage lo Pull-up Current Permissible Supply Voltage for Monitoring Function Turn-on Threshold at VB Undervoltage Threshold at VB Hysteresis Thermal Shutdown Temperature Status Monitor LED 301 302 303 304 305 306 307 308 V(LED) = 5 V...VB I(LED) = 200 µA V(LED) = 0 V...(VB − 1 V) -20 6 7.6 Decreasing voltage VB VBhys = VBon − VBoff 7.1 200 130 8 7.5 500 140 -100 3 5 8 0.4 -300 45 8.4 7.9 800 150 mA V µA V V V mV °C iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 5/9 ELECTRICAL CHARACTERISTICS Operating Conditions: VB = 10...45 V, LOUT = 0.01...10 H, RSET = 10...60 kΩ, Tj = -25...125 °C, unless otherwise noted. LED connected or pin LED linked to GND (via ca. 500 Ω resistor or capacitor). Item No. 309 310 311 Symbol Ton Thys f() Parameter Thermal Lock-on Threshold Thermal Shutdown Hysteresis Flash Frequency on Error Conditions Decreasing temperature Thys = Toff − Ton ERR = hi or PWMOK = 0, VB = 6...45 V Tj °C Fig. Min. 110 10 1.8 Typ. 120 20 2.4 Max. 130 30 3.6 °C °C Hz Unit Reference ISET 401 402 403 404 V() Isc() K1 CRrel Reference Voltage Short-Circuit Current V(ISET) = 0 V 1 1 Transfer Value for Energising I(OUT)start = 60...300 mA Current RSET = K1 / I(OUT)start Relative Current Ratio It(OUT)hold / It(OUT)start (Trigger Thresholds Ratio: Hold vs. Energise Mode) Transfer Value for Hold Current RSET = K2 / I(OUT)hold Oscillator Frequency Hold Mode Propagation Delay PWMOK = 1 before tpPWMlo I(OUT)start = 60...300 mA 1.14 -2.5 2900 63 1.20 -1.8 3400 66 1.26 -0.3 3900 71 V mA AΩ % 405 K2 I(OUT)hold = 40...200 mA 1930 2315 2700 AΩ Oscillator 501 601 fosc tpPWMlo 1 60 65 80 100 120 135 kHz ms Turn-on Current Control ELECTRICAL CHARACTERISTICS: Diagrams V(IN) Energise Mode Vt(IN)hi Hold Mode Vt(IN)lo Turn−off Vc(OUT−VB)hi [200mA] Vc(OUT−VB)hi [300mA] V(OUT) Vc(OUT−VB)off Time VB Vs(OUT)lo[200mA] Vs(OUT)lo[300mA] GND I(LOUT) 1/fosc twon(OUT)min Time It(OUT)start It(OUT)hold Time tmag tpPWMlo tdmag Figure 1: Operation modes: energise mode, hold mode and turn-off tmag ≈ tdmag ≈ It (OUT )start × LOUT VB It (OUT )hold × LOUT Vc (OUT − VB )hi (1) (2) iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 6/9 APPLICATIONS INFORMATION Setting the coil current The following equations can be given for the energise and hold modes of the PWM control using Electrical Characteristics Nos. 403 to 408: RSET = K2 I (OUT )hold (4) Example For a relay with a starting current of 100 mA (66 mA hold current) RSET is calculated as: K1 I (OUT )start 3250 Ω A = 32.5 k Ω 0.1 A RSET = (3) RSET = (5) Application circuits 10...45 V 10...45 V LOUT LOUT 0.01...10 H LED VB OUT 0.01...10 H IN IN LED VB OUT IN iC−JE CONTROL ISET RSET 10...60 k Ω GND 100 nF 100 nF iC−JE CONTROL ISET GND GND RSET 10...60 k Ω GND Figure 2: Driver/relay combination activated via the external control input IN Figure 3: Driver/relay combination activated via the supply pin GND 10...45 V 10...45 V LOUT LOUT 0.01...10 H 0.01...10 H IN LED VB OUT IN 100 nF LED VB OUT 0...100 nF iC−JE CONTROL ISET RSET 10...60 kΩ GND iC−JE CONTROL R1 R2 C1 GND ISET GND Figure 4: Driver/relay combination activated via the supply pin VB Figure 5: Increased energizing current due to the parallel RC-circuit iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 7/9 10...45 V LOUT 0.01...10 H IN (lo = GND) IN LED VB OUT D1 iC−JE CONTROL 100 nF R1 C1 ISET R2 10...60 k Ω GND GND Figure 6: Activation via pin IN with an increased energizing current. An additional Schottky diode discharges C1 if IN is switched to low (GND) 10...45 V 10...45 V IN LED VB OUT 100 nF iC−JE CONTROL ISET GND IN LED VB OUT LOUT 0.01...10 H RSET 10...60 k Ω LOUT 0.01...10 H 100 nF CONTROL ISET iC−JE GND GND RSET 10...60 k Ω GND Figure 7: High-side driver for an external relay with a flyback diode Figure 8: Low-side driver for an external relay with a flyback diode iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 8/9 EVALUATION BOARD The iC-JE is equipped with a Evaluation Board for test purposes. The following figures show the circuit diagram as well as the top and bottom layout of the test PCB. Evaluation Circuit R 0.5 RSENSE 1 The board comes with a strap between IN and SENSE1 (application equal to Fig. 4). The actual coil current can be measured by the voltage drop between SENSE1 and SENSE2 (1 mV/mA). Application Field VB1 VB1 D102 OUT OUT1 VB SENSE1 LED LED VB SENSE2 RELAIS H470 LOUT LED1 LED1 LED VB PWM COIL DRIVER IN IN iC−JE ISET OUT PWM COIL DRIVER IN1 IN iC−JE ISET GND GND CVB 100 nF RSET 33.2 k Ω CVB1 100 nF GND RSET1 33.2 k Ω GND1 Figure 9: Schematic diagram of the Evaluation Board I(LOUT) 100 mA 66 mA Energise Hold Turn−off 0 mA 35 V Vout 20 V 0V 0 ms 100 ms t aus Figure 11: Oscilloscope graph of the evaluation circuit (sampled) Figure 10: Evaluation Board (components side) This specification is for a newly developed product. iC-Haus therefore reserves the right to change or update, without notice, any information contained herein, design and specification; and to discontinue or limit production or distribution of any product versions. Please contact iC-Haus to ascertain the current data. Copying – even as an excerpt – is only permitted with iC-Haus approval in writing and precise reference to source. iC-Haus does not warrant the accuracy, completeness or timeliness of the specification on this site and does not assume liability for any errors or omissions in the materials. The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of merchantability, fitness for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which information refers and no guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or areas of applications of the product. iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade mark rights of a third party resulting from processing or handling of the product and/or any other use of the product. iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 9/9 ORDERING INFORMATION Type iC-JE Package PDIP8 SO8 Order Designation iC-JE PDIP8 iC-JE SO8 iC-JE EVAL JE1D Evaluation Board For information about prices, terms of delivery, other packaging options etc. please contact: iC-Haus GmbH Am Kuemmerling 18 D-55294 Bodenheim GERMANY Tel.: +49 (61 35) 92 92-0 Fax: +49 (61 35) 92 92-192 Web: http://www.ichaus.com E-Mail: sales@ichaus.com