iC-JE PWM RELAY/SOLENOID DRIVER Rev F1, Page 1/9 FEATURES APPLICATIONS ♦ Wide operating voltage range of 10 to 45 Vdc ♦ PWM control for coil currents of 40 to 300 mA ♦ Coil current for energise and hold modes set by an external resistor ♦ Coil current monitored during energise mode, detection of load breakage and voltage errors ♦ Automatic current reduction after 100 ms to reduce the power consumption in hold mode ♦ The internal free-wheeling alteration function supports PWM operation and quick demagnetising during shutdown ♦ Status signalled at the current-limited LED output ♦ Shutdown with excessive temperature and low voltage ♦ Integrated oscillator needs no external components ♦ PWM frequency is beyond audible range ♦ Protective circuitry against damage by ESD ♦ Minimum space requirements, few external components ♦ PWM drive for inductive loads (e.g. relays, electrovalves) ♦ Relay low-/high-side switch PACKAGES PDIP8 SO8 BLOCK DIAGRAM 10...45 V TURN−ON CURRENT ERR LOW VOLTAGE THERMAL SHUTDOWN 1 LED ON MUX 8 PWMOK 15 V HOLD MODE DELAY S Q START 2.4 Hz VB EN INI HOLD DRIVER OUTPUT CONTROL t >= 100 ms R OFF I V TURN−ON RESET LOUT 0.01...10 H OUT 7 GND 6 − + t = 25 us HOLD 3 IN INI REFERENCE x1.0 x0.66 INPUT + − iC−JE 0 MUX 1 PWM CONTROL 80 kHz PWMOK 1.2 V ISET 2 RSET 10...60 kΩ 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) ISET IN n.c. 2 3 4 8 iC−JE Code ... ... ...yyww LED 1 PIN FUNCTIONS No. Name Function 7 6 5 VB OUT GND n.c. PIN CONFIGURATION PDIP8 (top view) ISET IN n.c. iC−JE Code ... ... ...yyww 1 LED VB OUT GND n.c. 1 LED 2 ISET 3 4 5 6 7 8 IN n.c. n.c. GND OUT VB State monitor PWM Reference Current (setpoint adjustment) Input Ground PWM Output +10 to 45 V Supply Voltage 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 Conditions Fig. Unit Min. Max. G001 V(VB) Voltage at VB -0.3 48 V G002 I(VB) Current in VB -350 6 mA G003 V(OUT) Voltage at OUT -0.3 60 V G004 I(OUT) Output Current in OUT -6 350 mA G005 V(LED) Voltage at LED -0.3 VB V G006 I(LED) Current in LED -6 8 mA G007 V(ISET) Voltage at ISET -0.3 48 V G008 I(ISET) Current in ISET -6 6 mA G009 V(IN) Voltage at IN -0.3 48 V G010 I(IN) Current in IN -6 6 mA G011 Tj Junction Temperature -40 150 °C G012 Ts Storage Temperature -40 150 °C THERMAL DATA Operating Conditions: VB = 10...45 V, LOUT = 0.01...10 H, RSET = 10...60 kΩ Item No. Symbol Parameter Conditions Fig. Unit Min. -25 Typ. Max. T01 Ta Operating Ambient Temperature Range 80 °C T02 Rthja Thermal Resistance Chip/Ambient PDIP8 package 110 K/W T03 Rthja Thermal Resistance Chip/Ambient SO8 package 140 K/W 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. Symbol Parameter Conditions Tj °C Fig. Unit Min. Typ. Max. Total Device 001 VB Permissible Supply Voltage Range 10 45 V 002 I(VB) Supply Current in VB 003 I(VB) Supply Current in VB Outputs OUT, LED disabled 0.5 2 mA Output OUT enabled 0.5 3 004 Vc()lo Clamp Voltage lo at all Pins mA I() = -4 mA, other Pins open -1.4 -0.3 005 Vc()hi Clamp Voltage hi at VB, IN, ISET I() = 4 mA, other Pins open 48 57 V 006 Vc()hi Clamp Voltage hi at OUT I(OUT) = 4 mA, other Pins open 60 71 007 Vc()hi Clamp Voltage hi at LED vs. VB Vc()hi = V(LED) − V(VB); I(LED) = 4 mA, other Pins open 0.3 V V 1.4 V Driver Output OUT 101 Vs()lo Saturation Voltage lo I(OUT) = 200 mA 1 360 600 mV 102 103 Vs()lo Saturation Voltage lo I(OUT) = 300 mA 1 550 850 mV PWMthi Permissible Energising Current 300 350 mA mA Increased Energising Current by RC-circuit at ISET, Hold Current 200 mA max. 104 PWMthi Permissible Hold Current 105 Isc() Short-circuit Current V(OUT) = VB 106 Vc()hi Clamp Voltage hi at PWM-Free-Wheeling Vc()hi = V(OUT) − VB; IN = hi, I(OUT) = 200 mA 107 Vc()hi Clamp Voltage hi at PWM-Free-Wheeling 108 Vc()off 109 110 111 1 5, 6 1 40 0.6 mA 1 1.7 A 1 1 1.5 V Vc()hi = V(OUT) − VB; IN = hi, I(OUT) = 300 mA 1 1.4 2 V Clamp Voltage hi at Turn-off Vc()hi = V(OUT) − VB; IN: hi → lo, I(OUT) = 200 mA 1 12 15 17 V IIK() Leakage Current IN = lo, V(OUT) = 0...VB 10 µA twon()min Minimum PWM Turn-on Duration IN = hi, ISET open 1 250 C() Permissible Load Capacitance 1 1000 ns 1 nF Input IN 201 Vt()on Threshold Voltage hi 2.6 2.85 3.2 V 202 Vt()off Threshold Voltage lo 1.7 2.0 2.3 V 203 Vt()hys Hysteresis Vt()hys = Vt()on − Vt()off 0.7 0.85 1.1 V 204 lpd() Pull-down Current V(IN) = 4...45 V 50 100 200 µA 205 Rpd() Pull-down Resistor V(IN) = 0...4 V 20 50 80 kΩ 206 tp(IN-OUT) Turn-on Delay IN: lo → hi 20 µs 207 tp(IN-OUT) Turn-off Delay IN: hi → lo 10 µs 208 tp(VBOUT) IN = VB, VB = VBoff → VBon 40 µs 209 tp(IN-LED) Delay Time from IN to LED (with light permanently on) PWMOK = 1 before tpPMWlo 65 100 135 ms 210 tp(IN-LED) Delay Time from IN to LED (with light flashing) PWMOK = 0 130 200 270 ms 3 5 8 mA Turn-on Delay when VB is powered up Status Monitor LED 301 Ipd() Pull-down Current V(LED) = 5 V...VB 302 Vs()lo Saturation Voltage lo I(LED) = 200 µA 303 Ipu() Pull-up Current V(LED) = 0 V...(VB − 1 V) 304 VBlo Permissible Supply Voltage for Monitoring Function 305 VBon Turn-on Threshold at VB 306 VBoff Undervoltage Threshold at VB Decreasing voltage VB 7.1 7.5 7.9 V 307 VBhys Hysteresis VBhys = VBon − VBoff 200 500 800 mV 308 Toff Thermal Shutdown Temperature 130 140 150 °C -20 -100 6 7.6 8 0.4 V -300 µA 45 V 8.4 V 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. Symbol Parameter Conditions Tj °C Fig. Unit Min. Typ. Max. 309 Ton Thermal Lock-on Threshold Decreasing temperature 110 120 130 310 Thys Thermal Shutdown Hysteresis Thys = Toff − Ton 10 20 30 °C °C 311 f() Flash Frequency on Error ERR = hi or PWMOK = 0, VB = 6...45 V 1.8 2.4 3.6 Hz 1.14 1.20 1.26 V -2.5 -1.8 -0.3 mA Reference ISET 401 V() Reference Voltage 402 Isc() Short-Circuit Current 403 K1 Transfer Value for Energising I(OUT)start = 60...300 mA Current RSET = K1 / I(OUT)start 1 2900 3400 3900 AΩ 404 CRrel Relative Current Ratio It(OUT)hold / It(OUT)start (Trigger Thresholds Ratio: Hold vs. Energise Mode) I(OUT)start = 60...300 mA 1 63 66 71 % 405 K2 Transfer Value for Hold Current RSET = K2 / I(OUT)hold I(OUT)hold = 40...200 mA 1930 2315 2700 AΩ 60 80 120 kHz 65 100 135 ms V(ISET) = 0 V Oscillator 501 fosc Oscillator Frequency 1 Turn-on Current Control 601 tpPWMlo Hold Mode Propagation Delay PWMOK = 1 before tpPWMlo ELECTRICAL CHARACTERISTICS: Diagrams V(IN) Energise Mode Vt(IN)lo Time V(OUT) Vc(OUT−VB)off Vc(OUT−VB)hi [300mA] Vt(IN)hi Vc(OUT−VB)hi [200mA] Turn−off Hold Mode Vs(OUT)lo[300mA] Vs(OUT)lo[200mA] VB GND Time 1/fosc I(LOUT) twon(OUT)min It(OUT)start It(OUT)hold Time tmag tdmag tpPWMlo Figure 1: Operation modes: energise mode, hold mode and turn-off tmag ≈ It(OUT )start × LOUT VB (1) tdmag ≈ It(OUT )hold × LOUT Vc (OUT − VB)hi (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: RSET = K1 I(OUT )start (3) RSET = 3250 ΩA = 32.5 k Ω 0.1 A (5) Application circuits 10...45 V 10...45 V LOUT 0.01...10 H LOUT 0.01...10 H IN IN LED VB LED IN OUT iC−JE OUT iC−JE 100 nF 100 nF CONTROL CONTROL ISET VB GND ISET GND RSET 10...60 kΩ RSET 10...60 k Ω GND Figure 2: Driver/relay combination activated via the external control input IN GND Figure 3: Driver/relay combination activated via the supply pin GND 10...45 V 10...45 V LOUT 0.01...10 H LOUT 0.01...10 H IN LED VB IN OUT LED VB 100 nF iC−JE iC−JE 0...100 nF CONTROL CONTROL ISET RSET 10...60 kΩ OUT ISET R1 GND GND R2 C1 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) LED IN VB OUT iC−JE D1 100 nF CONTROL C1 GND ISET R1 R2 10...60 kΩ 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 LOUT 0.01...10 H iC−JE 100 nF CONTROL ISET GND RSET 10...60 kΩ IN LOUT OUT iC−JE CONTROL ISET Figure 7: High-side driver for an external relay with a flyback diode VB 100 nF 0.01...10 H GND LED RSET 10...60 kΩ GND GND 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 VB LED LED iC−JE PWM COIL DRIVER OUT RSENSE 1 VB Application Field SENSE1 VB1 SENSE2 RELAIS H470 LOUT IN IN 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). LED1 OUT OUT1 IN GND ISET CVB 100 nF iC−JE D102 PWM COIL DRIVER IN1 GND VB1 VB LED LED1 ISET RSET 33.2 k Ω CVB1 100 nF RSET1 33.2 k Ω GND GND1 Figure 9: Schematic diagram of the Evaluation Board I(LOUT) Energise 100 mA Hold Turn−off 66 mA 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 Package Order Designation iC-JE PDIP8 SO8 iC-JE PDIP8 iC-JE SO8 Evaluation Board iC-JE EVAL JE1D 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: [email protected]