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HA16103 FPJ/FPK
Watchdog Timer
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 FP-20DA FP-20DA
HA16103 FPJ/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)
2
HA16103 FPJ/FPK
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 R R . Reset-signal power-on time depends on RR Connect resistor C R . 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)} x Voadj Unit for R1: k 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 re-start 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(t RES, tr ). If delay time is unnecessary, make this pin open (t RES = 2 s typ. tr = 10 s 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)} x V NMIadj. Unit for R2, R3: k 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 x {1 + 21/(7.9 + 8.85 // R4)} x V STBYadj Unit for R4: k 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
3
HA16103 FPJ/FPK
Block Diagram
VOUT
VCONT VCC 13 V oadj
8 12 9
+ VOUT 3.3 k
Comparator for STBY
5.34 k 2 k Error amplifier
19
STBY
Starter circuit
Reference voltage generator
Delay circuit
Comparator for RES
14
CRES 3.3 k
Comparator for NMI
16
NMI
2
18
P-RUN Power on reset and automatic reset circuit
15 5
VSTBYadj 3.3 k
17
Band-pass filter circuit
3
Watchdog timer
4
RES
7
Rf
1000 pF
Cf
VNMIadj
RR
6
CR
GND
4
HA16103 FPJ/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.
To microcomputer system 100 F 5.34 Vout = (1+ R1 // 2.0 ) x Voadj Equation 1 (R1: k) (Voadj 1.31V)
VBATT
Q1
R1 VCONT VOUT HA16103
C1
VCC GND
Figure 1 Fine Adjustment Circuit of Output Voltage
5
I OUT = 0.1 A 0.5 A (Ta = 25C)
4
Output voltage (V)
1A 3
2
0
1:
1
1
5 Input voltage VCC (V)
10
Figure 2 Output Voltage Characteristic
5
HA16103 FPJ/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.
RES HA16103 RR CR
t on = 0.46 x C R x R R x Vout(s) Equation 2 RR:
200 m 180 m 160 m Power-on time ton (s) 140 m 120 m 100 m 80 m 60 m 40 m 20 m 0 100 k 200 k
(Ta = 25C) VCC = 12 V
CR = 0.22 F
CR = 0.1 F
CR = 0.047 F
500 k
Resistance RR ()
Figure 3 Characteristic of Power-On Reset Circuit
6
HA16103 FPJ/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 :
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 = 25C) P--Run pulse duty ratio 50% (fixed) VCC = 12 V CR = 0.1 F RR = 180 k
Cf = 0.022 F
Cf = 0.01 F Cf = 0.0047 F
100 k
200 k Resistance Rf ()
500 k
Figure 4 Characteristic of Power-On Reset Circuit
7
HA16103 FPJ/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 V STBY) * 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
8
HA16103 FPJ/FPK
Absolute Maximum Ratings (Ta = 25C)
Ratings Item VCC supply voltage Control pin voltage Control pin current VOUT pin voltage Power dissipation Operating ambient temperature range Storage temperature range Symbol VCC VCONT I CONT VOUT PT Topr Tstg HA16103FPJ HA16103FPK Units 40 40 20 12 400*
1
40 40 20 12 400*
2
V V mA V mW C C
-40 to +85 -50 to +125
-40 to +125 -50 to +150
Notes: 1. Value under Ta 77C. 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) = j-a*Pc (max)+Ta (j-a is thermal resistance value during mounting, and Pc (max) is the maximum value of IC power dissipation.) Therefore, to keep Tj (max) 125C, 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 j-a (C/W)
240 220 200 180 160 140 120 100 80 SOP20 using paste containing compound
SOP20 without compound 40 mm
Board
0.8 t ceramic or 1.5 t epoxy
(1)
(2)
(3)
0.5
1
2
5
10
20
(1) (2) (3)
Board thermal conductivity (W/mC) Glass epoxy board with 10% wiring density Glass epoxy board with 30% wiring density Ceramic board with 96% alumina coefficient
9
HA16103 FPJ/FPK
Electrical Characteristics (Ta = 25C, VCC = 12 V, VOUT = 5 V)
HA16103FPJ/FPK
Item Supply current Regulator Output voltage Symbol I CCL 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 I OUT = 0.5 A, R1 = 30 k VCC = 6 to 17.5 V I OUT = 1 A, R1 = 30 k VCC = 6 to 17.5 V I OUT = 1 A, R1 = 30 k I OUT = 10 mA to 0.5 A, R1 = 30 k Vi = 0.5 Vrms, fi = 1 kHz, R1 = 30 k VCC = 12 V, R1 = 30 k
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 Voline Voload RREJ VO/T
4.70 -50 -100 45 --
5.00 -- -- 75 0.6
5.30 50 100 -- --
V mV mV dB mV/C
VIL VIH I IL I IH
-- 2.0 -120 --
-- -- -60 0.3
0.8 -- -- 0.5
V V A mA VIL = 0 V VIH = 5 V
10
HA16103 FPJ/FPK
Electrical Characteristics (Ta = 25C, VCC = 12 V, VOUT = 5 V) (cont)
Item NMI output NMI pin "L"-level voltage NMI pin "H"-level voltage NMI function start VOUT voltage STBY output STBY pin "L"-level voltage STBY pin "H"-level voltage Symbol VOL1 VOH1 VNMI VOL2 VOH2 Min -- -- -- -- -- -- -- -- -- 25 80 15 37 4.40 50 2.9 1.35 -- -- Typ -- VO1 (VO2 ) 0.7 -- VO1 (VO2 ) 0.7 -- VO1 (VO2 ) 0.7 40 130 20 60 4.60 100 3.2 1.5 200 200 Max 0.4 -- 1.4 0.4 -- 1.4 0.4 -- 1.4 60 190 30 90 4.80 150 3.5 1.65 -- -- Unit V V V V V V V V V ms ms ms ms V mV V V s s CRES = 2200 pF CRES = 2200 pF Rf = 180 k, R R = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, R R = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, R R = 180 k Cf = 0.01 F, CR = 0.1 F I OL3 = 2 mA I OL2 = 2 mA Test Condition I OL1 = 2 mA
STBY function start VSTBY VOUT voltage RES output RES pin "L"-level voltage RES pin "H"-level voltage RES function start VOUT voltage Power on time VOL3 VOH3 VRES t ON
Clock off reset time t OFF Reset pulse "L"-level time Reset pulse "H"-level time Low Voltage protecton t RL t RH
Detection voltage(1) VH1 Detection voltage(1) VHYS1 Hysteresis width Detection voltage(2) VH2 Detection voltage(2) VHYS2 Hysteresis width Reset inhibit pulse Delay time restart t RES tr
11
HA16103 FPJ/FPK
Electrical Characteristics (Ta = -40 to 125C, VCC = 12 V, VOUT = 5 V, R1 = 30 k ) (cont)
HA16103FPK
Item Supply current Regulator Output voltage Line regulation Load regulation 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 STBY output STBY pin "L"-level voltage STBY pin "H"-level voltage RES output RES pin "L"-level voltage RES pin "H"-level voltage Power on time Symbol I CC1 Vout1 Voline Voload VIL VIH I IL I IH VOLN VOHN VOLS VOHS VOLR VOHR t ON 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 A mA V V V V V V ms ms ms ms V V Rf = 180 k, R R = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, R R = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, R R = 180 k Cf = 0.01 F, CR = 0.1 F I OL3 = 2 mA I OL2 = 2 mA VIL = 0 V VIH = 5 V I OL1 = 2 mA VCC = 6 to 17.5 V I OUT = 0.5 A VCC = 6 to 17.5 V I OUT = 0.5 A I OUT = 10 mA to 0.5 A Test Condition
Clock off reset time t OFF Reset pulse "L"-level time Reset pulse "H"-level time t RL t RH
Low Voltage Detection voltage(1) VNMI protecton Detection voltage(2) VSTBY
12
HA16103 FPJ/FPK
Test Circuit
S1 2SB857D Q1
VOUT R1 C1 100
VCC
VCONT VOUT Voadj VNMIadj NMI HA16103 STBY RES VSTBYadj CR CRES 2200 p Unit R: C: F Counter
GND P-RUN Rf VBATT 1000 p
Cf
0.01
RR
0.1 180 k
180 k
Sample Connection Circuit
Sample Connection Circuit between HA16103 and H8/532
To other microcomputer systems
D1
S1
IGN,SW
VZ1 VCC
Q1
100 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
RR
CR
0.1
VSTBYadj CRES CRES 2200 p
PORT GND R4
0.01
VBATT
1000 p
180 k
180 k
Unit (1)
R: C: F
13
HA16103 FPJ/FPK
Sample Connection Circuit between HA16103 and H8/532 (2)
S1 IGN. SW Q1
V Z1
C1 100
R1 R2
Q2
Q3
VCC
VCONT VOUT Voadj VNMIadj
R3 NMI STBY H8/532 RES PORT GND
R4
NMI R5 HA16103 C2
V Z2
VCC
STBY RES
GND CLK
Rf Cf RR CR
V STBYadj C RES
1000 p
180 k 0.01 180 k 0.1
2200 p
V BATT
V OUT
NMI HA16103 GND CLK Rf
Cf RR CR
NMI STBY
VCC H8/532
STBY RES
V STBYadj C RES 2200 p
RES PORT GND
1000 p
180 k
0.01 180 k 0.1
Unit
R: C: F
14
HA16103 FPJ/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 VOUT -GND 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
Vcont
Wiring impedance C RES + -
RES
GND
Figure 7 RES Comparator
15
HA16103 FPJ/FPK
* Low-voltage inhibit section Low-Voltage Reset Pulse Delay vs. CRES T a = 25C V CC = 12 V R1 = 30 k
Low-Voltage Reset Pulse Delay tRES (sec)
3m
2m Rf = 360 k Rf = 560 k 1m
Rf = 180 k 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 Ta = 25C V IN = 12 V Runaway detected at 100% Permissible P-RUN duty cycle A B
P-RUN Pulse Frequency (Hz)
2k 1k 500 200 100 50 20 10 0 20 40 60 80 100 duty = B x 100 A+B
P-RUN Pulse Duty Cycle (%)
16
HA16103 FPJ/FPK
* Low-voltage inhibit section Low-Voltage Reset Pulse Recovery Delay vs. CRES Low-Voltage Reset Pulse Recovery Delay tr (sec) Ta = 25C V CC = 12 V R1 = 30 k
3m
2m
Rf =
1m
56
Rf = 36 0 k
0k
Rf =
0 1000 p 2000 p 3000 p C RES (F)
180
k
5000 p 7000 p 10000 p
* Power-on and auto-reset section Reset Low Time vs. Resistance RR 160 m Ta = 25C 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
= CR
2 0.2
F
.1 F
C
=0 R
C R= 0
0 100 k 200 k 300 k Resistance RR ()
.047
F
500 k
17
HA16103 FPJ/FPK
* Power-on and auto-reset section Clock-Off Time vs. Resistance RR 700 m Ta = 25C V CC = 12 V V OUT = 5 V typ
600 m
Clock-Off Time tOFF (s)
500 m
400 m
C R = 0.22 F
300 m C R = 0.1 F 200 m
100 m C R = 0.047 F 0 100 k * Vref section Output Voltage vs. Adjustment Resistance 5.30 Ta = 25C V CC = 12 V 200 k 300 k Resistance RR () 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 () 1M
18
HA16103 FPJ/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) 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 F 200 k 300 k Resistance RR () 500 k C R = 0.1 F C R = 0.22 F Ta = 25C V CC = 12 V V OUT = 5 V typ
19
HA16103 FPJ/FPK
Package Dimensions
Unit: mm
12.6 13 Max
20
11
1
10
5.5
0.80 Max
2.20 Max
*0.22 0.05 0.20 0.04
0.20 7.80 + 0.30 -
1.15
0 - 8
0.70 0.20
1.27 *0.42 0.08 0.40 0.06
0.12 M
*Dimension including the plating thickness Base material dimension
0.10 0.10
0.15
Hitachi Code JEDEC EIAJ Mass (reference value)
FP-20DA -- Conforms 0.31 g
20
HA16103 FPJ/FPK
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party's rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi's sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor products.
Hitachi, Ltd.
Semiconductor & Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
URL
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Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic components Group Dornacher Strae 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 Hitachi Asia (Hong Kong) Ltd. Group III (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road, Tsim Sha Tsui, Kowloon, Hong Kong Tel: <852> (2) 735 9218 Fax: <852> (2) 730 0281 Telex: 40815 HITEC HX
Copyright ' Hitachi, Ltd., 1998. All rights reserved. Printed in Japan.
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