HA16103FPJ

HA16103FPJ/FPK Watchdog Timer REJ03F0140-0300 (Previous: ADE-204-010B) Rev.3.00 Jun 15, 2005 Description The HA16103FPJ/FPK monolithic voltage control is designed for microcomputer systems. In addition to voltage regulator, it includes watch dog timer function, power on reset function, and output voltage monitor function. It is suitable for battery use microcomputer systems. Functions • • • • 5 V regulated power supply Power on reset pulse generator Watch dog timer Low voltage inhibit protection Features • Wide operational supply voltage range (VCC = 6 to 40 V) • Various control signals are generated when microcomputer system runaway occurs. (NMI signal and STBY signal are generated by detecting voltage level, and RES signal is generated by monitoring the time after NMI signal is detected) • Regulated voltage, NMI detecting voltage, STBY detecting voltage are adjustable. • At low voltage and re-start, the delay time of RES signal is adjustable • Watchdog timer filtering uses the minimum clock input pulse width and maximum cycle detection method Ordering Information Type No. HA16103FPJ HA16103FPK Package Code (Previous Code) PRSP0020DD-A (FP-20DA) PRSP0020DD-A (FP-20DA) Rev.3.00 Jun 15, 2005 page 1 of 18 HA16103FPJ/FPK Pin Arrangement NC P-RUN Rf Cf RR CR GND VOadj VOUT NC 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 NC STBY VSTBYadj RES NMI VNMIadj CRES V CC VCONT NC (Top view) Pin Functions No. 1 2 3 4 5 6 7 8 Pin Name NC P-RUN Rf Cf RR CR GND Voadj Description NC pin P-RUN signal input pin for watchdog timer Connect resistor Rf. Frequency bandwidth of the filter circuit depends on Rf Connect resistor Cf. Frequency bandwidth of the filter circuit depends on Cf Connect resistor RR. Reset-signal power-on time depends on RR Connect resistor CR. Reset-signal power-on time depends on CR Ground 5-V reference voltage fine-tuning pin. Connect a resistor between this pin and GND. The value of output voltage is given by VOUT = {1 + 5.34/(R1 // 2.0)} × Voadj Unit for R1: kΩ Connect the collector of an external PNP-type transistor. The pin supplies 5-V regulated voltage for internal circuit NC pin NC pin The external PNP-type transistor’s base control pin Supply voltage pin. Operating supply voltage range is 6.0 to 40 V. If the voltage of VOUT pin declines to less than Detection voltage(1) (because of an instant power cut or other cause), NMI signals are generated. If tRES ≈ 0.5•Rf•CRES(sec) has passed since then, RES signals are generated. If the voltage of VOUT pin inclines to more than Detection voltage(1) (in case of restart from LVI state), NMI signals are stop. tr ≈ 0.5•Rf•CRES(sec) has passed since then, RES signals are stop. Connect capacitor CRES between this pin and GND to adjust the RES signals delay time(tRES, tr). If delay time is unnecessary, make this pin open (tRES = 2 µs typ. tr = 10 µs typ. at open) NMI detection voltage fine-tuning pin. Connect a resistor between this pin and VOUT pin or GND. The value of output voltage is given by VNMI = {1 + (R2 // 25.5)/(R3 // 10.6)} × VNMIadj. Unit for R2, R3: kΩ NMI signal output pin. Connect to pin NMI of the microcomputer RES signal output pin. Connect to pin RES of the microcomputer STBY detection voltage tuning pin. Connect a resistor between this pin and VOUT or GND. The value of output voltage is given by VSTBY = 1.89 × {1 + 21/(7.9 + 8.85 // R4)} × VSTBYadj Unit for R4: kΩ STBY signal output pin. Connect to pin STBY of the microcomputer NC pin 9 10 11 12 13 14 VOUT NC NC VCONT VCC CRES 15 VNMIadj 16 17 18 NMI RES VSTBYadj 19 20 STBY NC Rev.3.00 Jun 15, 2005 page 2 of 18 HA16103FPJ/FPK Block Diagram + VOUT VOUT VCONT VCC 13 V oadj 8 12 9 5.34 kΩ 2 kΩ Error amplifier Comparator for STBY 3.3 kΩ 19 STBY Starter circuit Reference voltage generator Delay circuit Comparator for RES 14 3.3 kΩ Comparator for NMI CRES 16 NMI 2 18 P-RUN VSTBYadj Band-pass filter circuit 3 Watchdog timer 4 Power on reset and automatic reset circuit 15 5 3.3 kΩ 17 RES 7 Rf 1000 pF Cf VNMIadj RR 6 CR GND Rev.3.00 Jun 15, 2005 page 3 of 18 HA16103FPJ/FPK Functional Description Stabilized Power Supply Function The stabilized power supply includes the following features: • Wide range of operating input voltage from 6 V to 40 V to provide stabilized voltages • Availability of any output current, by simply replacing the external transistor • Fine adjustment of output voltage Figure 1 shows the fine adjustment circuit of the output circuit. Select the resistor R1 as shown in equation 1. Add a resistor between GND and Voadj to increase the output voltage. VBATT Q1 To microcomputer system 100 µF R1 VCONT VOUT HA16103 C1 VCC GND 5.34 Vout = (1+ R1 // 2.0 ) × Voadj ⋅ ⋅ ⋅ ⋅ Equation 1 (R1: kΩ) (Voadj 1.31V) Figure 1 Fine Adjustment Circuit of Output Voltage 5 I OUT = 0.1 A 0.5 A (Ta = 25°C) 1A 4 Output voltage (V) 3 2 0 1: 1 1 5 Input voltage VCC (V) 10 Figure 2 Output Voltage Characteristic Rev.3.00 Jun 15, 2005 page 4 of 18 HA16103FPJ/FPK Power-On Reset Function The system contains the power-on reset function required when a microcomputer is turned on. The reset period may be set with external components RR and CR. Equation 2 specifies how to determine the reset period (ton) and figure 3 shows the characteristic of the circuit. HA16103 RR CR RES t on = 0.46 x C R x R R x Vout(s) ⋅ ⋅ ⋅ ⋅ Equation 2 RR: Ω 200 m 180 m 160 m Power-on time ton (s) (Ta = 25°C) VCC = 12 V 140 m 120 m 100 m 80 m 60 m 40 m 20 m 0 100 k 200 k Resistance RR (Ω) CR = 0.22 µF CR = 0.1 µF CR = 0.047 µF 500 k Figure 3 Characteristic of Power-On Reset Circuit Rev.3.00 Jun 15, 2005 page 5 of 18 HA16103FPJ/FPK Watchdog Timer Function The system contains a bandpass filter for pulse width detection, which outputs a reset pulse when input pulses are not at the preselected frequency (at either a higher or lower frequency). The RC characteristic of the bandpass filter may be set with external components Rf and Cf. Equation 3 specifies how to determine the minimum pulse width (tmin) for runaway detection of the bandpass filter, and figure 4 shows the characteristic of the filter. HA16103 Rf Cf tmin = Cf x Rf x 0.11 (s) ⋅ ⋅ ⋅ ⋅ Equation 3 Rf : Ω 2.0 m Runaway-detection minimum pulse width tmin (s) 1.8 m 1.6 m 1.4 m 1.2 m 1.0 m 0.8 m 0.6 m 0.4 m 0.2 m (Ta = 25°C) P—Run pulse duty ratio 50% (fixed) VCC = 12 V CR = 0.1 µF RR = 180 k Ω Cf = 0.022 µF Cf = 0.01 µF Cf = 0.0047 µF 100 k 200 k Resistance Rf (Ω) 500 k Figure 4 Characteristic of Power-On Reset Circuit Rev.3.00 Jun 15, 2005 page 6 of 18 HA16103FPJ/FPK Low Voltage Monitoring Function The system contains a circuit to send a control signal to the microcomputer when the output voltage drops. The circuit includes the following features. • Two-point monitoring of output voltage (VNMI and VSTBY) • Availability of fine adjustment of Vth1 (VNMI) and Vth2 (VSTBY) • Output of control signal in standby mode of microcomputer Figure 5 shows the timing chart of control signals when the output voltage drops. If the output voltage drops below Vth1 (4.60 V), the NMI signal rises to request the microcomputer to issue the NMI interrupt signal. The RES signal falls tRES seconds after the NMI signal rises. If the output voltage drops further to below Vth2 (3.2 V), the STBY signal rises to enable the micro-computer to enter standby mode. VBATT VO 4.70 V 4.60 V 4.70 V 4.60 V 3.20 V NMI Power on reset signal RES ton toff t RH t RL t RES tr t RES Automatic reset signal STBY P-RUN System runaway Figure 5 Timing Chart for Low Voltage Monitoring Rev.3.00 Jun 15, 2005 page 7 of 18 HA16103FPJ/FPK Absolute Maximum Ratings (Ta = 25°C) Ratings Item VCC supply voltage Control pin voltage Control pin current VOUT pin voltage Power dissipation Operating ambient temperature range VCC VCONT ICONT VOUT PT Topr Symbol HA16103FPJ 40 40 20 12 400* –40 to +85 1 HA16103FPK 40 40 20 12 400* –40 to +125 2 Units V V mA V mW °C Notes: 1. Value under Ta ≤ 77°C. If Ta is greater, 8.3 mW/°C derating occurs. 2. Allowable temperature of IC junction part, Tj (max), is as shown below. Tj (max) = θj–a•Pc (max)+Ta (θj-a is thermal resistance value during mounting, and Pc (max) is the maximum value of IC power dissipation.) Therefore, to keep Tj (max) ≤ 125°C, wiring density and board material must be selected according to the board thermal conductivity ratio shown below. Be careful that the value of Pc (max) does not exceed that PT. Thermal resistance θj–a(°C/W) 240 220 200 180 160 140 120 100 80 SOP20 using paste containing compound (1) (2) (3) SOP20 without compound 40 mm Board 0.8 t ceramic or 1.5 t epoxy 0.5 1 2 5 10 20 (1) (2) (3) Board thermal conductivity (W/m°C) Glass epoxy board with 10% wiring density Glass epoxy board with 30% wiring density Ceramic board with 96% alumina coefficient Rev.3.00 Jun 15, 2005 page 8 of 18 HA16103FPJ/FPK Electrical Characteristics (Ta = 25°C, VCC = 12 V, VOUT = 5 V) HA16103FPJ/FPK Item Supply current Regulator Output voltage Symbol ICCL VO1 Min – 4.80 Typ 8 5.00 Max 12 5.20 Unit mA V Test Condition VCC = 12 V VCC = 6 to 17.5 V IOUT = 0.5 A, R1 = 30 kΩ VCC = 6 to 17.5 V IOUT = 1 A, R1 = 30 kΩ VCC = 6 to 17.5 V IOUT = 1 A, R1 = 30 kΩ IOUT = 10 mA to 0.5 A, R1 = 30 kΩ Vi = 0.5 Vrms, fi = 1 kHz, R1 = 30 kΩ VCC = 12 V, R1 = 30 kΩ VO2 Line regulation Load regulation Ripple rejection Output voltage Temperature coefficient Clock input “L”-input voltage “H”-input voltage “L”-input current “H”-input current NMI output NMI pin “L”-level voltage NMI pin “H”-level voltage NMI function start VOUT voltage STBY pin “L”-level voltage STBY pin “H”-level voltage STBY function start VOUT voltage RES output RES pin “L”-level voltage RES pin “H”-level voltage RES function start VOUT voltage Power on time Clock off reset time Reset pulse “L”-level time Reset pulse “H”-level time Voline Voload RREJ δVO/δT 4.70 –50 –100 45 – 5.00 – – 75 0.6 5.30 50 100 – – V mV mV dB mV/°C VIL VIH IIL IIH VOL1 VOH1 VNMI VOL2 VOH2 VSTBY VOL3 VOH3 VRES tON tOFF tRL tRH – 2.0 –120 – – – – – – – – – – 25 80 15 37 – – –60 0.3 – VO1 (VO2) 0.7 – VO1 (VO2) 0.7 – VO1 (VO2) 0.7 40 130 20 60 0.8 – – 0.5 0.4 – 1.4 0.4 – 1.4 0.4 – 1.4 60 190 30 90 V V µA mA V V V V V V V V V ms ms ms ms Rf = 180 kΩ, RR = 180 kΩ Cf = 0.01 µF, CR = 0.1 µF Rf = 180 kΩ, RR = 180 kΩ Cf = 0.01 µF, CR = 0.1 µF Rf = 180 kΩ, RR = 180 kΩ Cf = 0.01 µF, CR = 0.1 µF IOL3 = 2 mA IOL2 = 2 mA VIL = 0 V VIH = 5 V IOL1 = 2 mA STBY output Rev.3.00 Jun 15, 2005 page 9 of 18 HA16103FPJ/FPK Electrical Characteristics (cont.) (Ta = 25°C, VCC = 12 V, VOUT = 5 V) Low Voltage protecton Item Detection voltage(1) Detection voltage(1) Hysteresis width Detection voltage(2) Detection voltage(2) Hysteresis width Reset inhibit pulse restart Delay time Symbol VH1 VHYS1 VH2 VHYS2 tRES tr Min 4.40 50 2.9 1.35 – – Typ 4.60 100 3.2 1.5 200 200 Max 4.80 150 3.5 1.65 – – Unit V mV V V µs µs CRES = 2200 pF CRES = 2200 pF Test Condition (Ta = –40 to 125°C, VCC = 12 V, VOUT = 5 V, R1 = 30 kΩ) HA16103FPK Item Supply current Regulator Output voltage Line regulation Load regulation “L”-input voltage “H”-input voltage “L”-input current NMI output “H”-input current NMI pin “L”-level voltage NMI pin “H”-level voltage STBY pin “L”-level voltage STBY pin “H”-level voltage RES pin “L”-level voltage RES pin “H”-level voltage Power on time Clock off reset time Reset pulse “L”-level time Reset pulse “H”-level time Detection voltage(1) Detection voltage(2) Symbol ICC1 Vout1 Voline Voload VIL VIH IIL IIH VOLN VOHN VOLS VOHS VOLR VOHR tON tOFF tRL tRH VNMI VSTBY Min – 4.80 –50 –100 – 2.4 –120 – – – – – – – 25 70 15 30 4.35 2.80 Typ 7 5.00 – – – – –60 0.3 – VOUT1 – VOUT1 – VOUT1 40 130 20 60 4.60 3.20 Max 13 5.20 50 100 0.4 – – 0.6 0.5 – 0.5 – 0.5 – 60 200 30 100 4.85 3.60 Unit mA V mV mV V V µA mA V V V V V V ms ms ms ms V V Rf = 180 kΩ, RR = 180 kΩ Cf = 0.01 µF, CR = 0.1 µF Rf = 180 kΩ, RR = 180 kΩ Cf = 0.01 µF, CR = 0.1 µF Rf = 180 kΩ, RR = 180 kΩ Cf = 0.01 µF, CR = 0.1 µF IOL3 = 2 mA IOL2 = 2 mA Test Condition VCC = 6 to 17.5 V IOUT = 0.5 A VCC = 6 to 17.5 V IOUT = 0.5 A IOUT = 10 mA to 0.5 A Clock input VIL = 0 V VIH = 5 V IOL1 = 2 mA STBY output RES output Low Voltage protecton Rev.3.00 Jun 15, 2005 page 10 of 18 HA16103FPJ/FPK Test Circuit S1 2SB857D Q1 VOUT R1 C1 100 µ VCC VCONT VOUT Voadj VNMIadj NMI HA16103 GND P-RUN Rf VBATT STBY RES VSTBYadj CR CRES 2200 p Counter Cf 0.01 µ RR 1000 p 0.1 µ Unit 180 k 180 k R: Ω C: F Sample Connection Circuit Sample Connection Circuit between HA16103 and H8/532 To other microcomputer systems D1 S1 IGN,SW VZ1 VCC Q1 100 µ C1 R1 Q2 VCONT VOUT Voadj VNMIadj NMI R2 R3 Q3 NMI STBY RES VCC R5 C2 VZ2 GND P-RUN R f HA16103 STBY RES H8/532 Cf 0.01 µ RR CR 0.1 µ VSTBYadj CRES CRES 2200 p PORT GND R4 VBATT 1000 p 180 k 180 k Unit R: Ω C: F Rev.3.00 Jun 15, 2005 page 11 of 18 HA16103FPJ/FPK Sample Connection Circuit between HA16103 and H8/532 (2) S1 IGN. SW Q1 V Z1 C1 100 µ R1 R2 Q2 Q3 VCC VCONT VOUT Voadj VNMIadj NMI R5 HA16103 R3 NMI STBY RES VCC H8/532 STBY RES C2 V Z2 GND CLK Rf Cf RR CR V STBYadj PORT GND R4 C RES 1000 p 180 k 0.01 µ 180 k 0.1 µ 2200 p V BATT V OUT NMI HA16103 NMI STBY RES VCC H8/532 STBY RES V STBYadj GND CLK Rf Cf RR CR C RES PORT GND 1000 p 180 k 0.01 µ 180 k 0.1 µ 2200 p Unit R: Ω C: F Rev.3.00 Jun 15, 2005 page 12 of 18 HA16103FPJ/FPK Precautions If the IC’s ground potential varies suddenly by several volts due to wiring impedance (see figure 6), a false RES pulse may be output. The reason for this is that potentials in the RES pulse generating circuit change together with the VOUTGND potential. The reference potential of the comparator in figure 7 and the potential of the external capacitor have different impedances as seen from the comparator, causing a momentary inversion. The solution is to stabilize the ground potential. Two ways of stabilizing the IC’s ground line are: • Separate the IC’s ground line from highcurrent ground lines. • Increase the capacitance (Co) used to smooth the VOUT output. Wiring impedance SW2 SW1 HA16103PJ/FPJ V IGN Co RL Relay or other load Wiring impedance Figure 6 Typical Circuit Vout V CC CC Vcont Wiring impedance RES + + – − C RES GND GND Figure 7 RES Comparator Rev.3.00 Jun 15, 2005 page 13 of 18 HA16103FPJ/FPK • Low-voltage inhibit section Low-Voltage Reset Pulse Delay vs. CRES T a = 25°C V CC = 12 V R1 = 30 kΩ Low-Voltage Reset Pulse Delay tRES (sec) 3m 2m Rf = 360 kΩ Rf = 560 kΩ 1m Rf = 180 kΩ 0 1000 p 2000 p 3000 p C RES (F) 5000 p 7000 p 10000 p Permissible P-RUN Pulse Duty Cycle vs. P-RUN Pulse Frequency 20 k 10 k 5k P-RUN Pulse Frequency (Hz) Ta = 25°C V IN = 12 V Runaway detected at 100% Permissible P-RUN duty cycle A B 2k 1k 500 200 100 50 20 10 0 20 40 60 80 100 duty = B× 100 A+B P-RUN Pulse Duty Cycle (%) Rev.3.00 Jun 15, 2005 page 14 of 18 HA16103FPJ/FPK • Low-voltage inhibit section Low-Voltage Reset Pulse Recovery Delay vs. CRES Low-Voltage Reset Pulse Recovery Delay tr (sec) 3m Ta = 25°C V CC = 12 V R1 = 30 kΩ =5 60 kΩ 2m Rf 1m Rf = 36 0 kΩ Rf = 180 kΩ 0 1000 p 2000 p 3000 p C RES (F) 5000 p 7000 p 10000 p • Power-on and auto-reset section Reset Low Time vs. Resistance RR 160 m Ta = 25°C V CC = 12 V 140 m V OUT = 5 V typ 120 m Reset Low Time tRL (s) 100 m 80 m 60 m 40 m 20 m 0 100 k = CR 2 0.2 µF C =0 R .1 µ F C R= 0 200 k 300 k Resistance RR (Ω) .047 µ F 500 k Rev.3.00 Jun 15, 2005 page 15 of 18 HA16103FPJ/FPK • Power-on and auto-reset section Clock-Off Time vs. Resistance RR 700 m Ta = 25°C V CC = 12 V V OUT = 5 V typ 600 m Clock-Off Time tOFF (s) 500 m 400 m C R = 0.22 µF 300 m C R = 0.1 µF 200 m 100 m C R = 0.047 µF 0 100 k • Vref section Output Voltage vs. Adjustment Resistance 5.30 Ta = 25°C V CC = 12 V 200 k 300 k Resistance RR (Ω) 500 k 5.20 Output Voltage VOUT (V) 5.10 5.00 4.90 4.80 4.70 0 10 k 100 k VOUT Adjustment Resistance R1 (Ω) 1M Rev.3.00 Jun 15, 2005 page 16 of 18 HA16103FPJ/FPK • Power-on and auto-reset section Reset High Time vs. Resistance RR 280 m 260 m 240 m 220 m Reset High Time tRH (s) Ta = 25°C V CC = 12 V V OUT = 5 V typ 200 m 180 m 160 m 140 m 120 m 100 m 80 m 60 m 40 m 20 m 0 100 k C R = 0.047 µF 200 k 300 k Resistance RR (Ω) 500 k C R = 0.1 µF C R = 0.22 µF Rev.3.00 Jun 15, 2005 page 17 of 18 HA16103FPJ/FPK Package Dimensions JEITA Package Code P-SOP20-5.5x12.6-1.27 RENESAS Code PRSP0020DD-A Previous Code FP-20DA MASS[Typ.] 0.31g *1 D F NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. 20 11 bp b1 HE c1 E Index mark Reference Symbol *2 c Dimension in Millimeters Min Nom 12.6 5.5 Max 13 Terminal cross section D E 1 Z e *3 10 bp A2 A1 0.00 0.10 0.20 2.20 0.34 0.42 0.40 0.17 1 x M L1 A bp b1 c c 0.50 0.22 0.20 0.27 A θ HE 0° 7.50 7.80 1.27 8° 8.00 θ A1 y L e x y 0.12 0.15 0.80 0.50 1 Detail F Z L L 0.70 1.15 0.90 Rev.3.00 Jun 15, 2005 page 18 of 18 Sales Strategic Planning Div. Keep safety first in your circuit designs! Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. 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