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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)} 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 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 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 VNMIadj. 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 VSTBYadj 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
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 k 2 k Error amplifier
Comparator for STBY
3.3 k
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
VSTBYadj
Band-pass filter circuit
3
Watchdog timer
4
Power on reset and automatic reset circuit
15 5
3.3 k
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 F
R1
VCONT VOUT
HA16103
C1
VCC GND
5.34 Vout = (1+ R1 // 2.0 ) x Voadj Equation 1 (R1: k) (Voadj 1.31V)
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
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:
200 m 180 m 160 m
Power-on time ton (s)
(Ta = 25C) VCC = 12 V
140 m 120 m 100 m 80 m 60 m 40 m 20 m 0 100 k 200 k Resistance RR ()
CR = 0.22 F
CR = 0.1 F
CR = 0.047 F
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 :
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
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 = 25C)
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 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
(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/mC)
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 = 25C, 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 k VCC = 6 to 17.5 V IOUT = 1 A, R1 = 30 k VCC = 6 to 17.5 V IOUT = 1 A, R1 = 30 k IOUT = 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 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 VO/T
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 A mA V V V V V V V V V ms ms ms ms Rf = 180 k, RR = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, RR = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, RR = 180 k Cf = 0.01 F, CR = 0.1 F 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 = 25C, 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 s s CRES = 2200 pF CRES = 2200 pF Test Condition
(Ta = -40 to 125C, VCC = 12 V, VOUT = 5 V, R1 = 30 k) 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 A mA V V V V V V ms ms ms ms V V Rf = 180 k, RR = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, RR = 180 k Cf = 0.01 F, CR = 0.1 F Rf = 180 k, RR = 180 k Cf = 0.01 F, CR = 0.1 F 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
VCC
VCONT VOUT Voadj VNMIadj NMI
HA16103
GND P-RUN Rf
VBATT
STBY RES VSTBYadj CR CRES 2200 p
Counter
Cf
0.01
RR
1000 p
0.1
Unit
180 k 180 k
R: 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 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
RR
CR
0.1
VSTBYadj CRES CRES 2200 p
PORT GND R4
VBATT
1000 p
180 k
180 k
Unit
R: 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
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 0.01 180 k 0.1
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
0.01 180 k 0.1
2200 p
Unit
R: 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
Vcont
Wiring impedance
RES
+ + - -
C RES
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 = 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
P-RUN Pulse Frequency (Hz)
Ta = 25C 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 = Bx 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 = 25C V CC = 12 V R1 = 30 k
=5 60 k
2m
Rf
1m
Rf
=
36
0
k
Rf =
180
k
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 = 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 0 100 k
= CR 2 0.2 F
C
=0 R
.1
F
C R= 0
200 k 300 k Resistance RR ()
.047
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 = 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
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 = 25C 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 F 200 k 300 k Resistance RR () 500 k C R = 0.1 F C R = 0.22 F
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
HE
0 7.50 7.80 1.27
8 8.00
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
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