HITACHI HA16103

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.
Package
HA16103FPJ
FP-20DA
HA16103FPK
FP-20DA
HA16103 FPJ/FPK
Pin Arrangement
NC
1
20
NC
P-RUN
2
19
STBY
Rf
3
18
VSTBYadj
Cf
4
17
RES
RR
5
16
NMI
CR
6
15
VNMIadj
GND
7
14
CRES
VOadj
8
13
V CC
VOUT
9
12
VCONT
NC
10
11
NC
(Top view)
2
HA16103 FPJ/FPK
Pin Functions
No.
Pin Name
Description
1
NC
NC pin
2
P-RUN
P-RUN signal input pin for watchdog timer
3
Rf
Connect resistor Rf. Frequency bandwidth of the filter circuit depends on Rf
4
Cf
Connect resistor Cf. Frequency bandwidth of the filter circuit depends on Cf
5
RR
Connect resistor R R . Reset-signal power-on time depends on RR
6
CR
Connect resistor C R . Reset-signal power-on time depends on CR
7
GND
Ground
8
Voadj
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
9
VOUT
Connect the collector of an external PNP-type transistor. The pin supplies 5-V
regulated voltage for internal circuit
10
NC
NC pin
11
NC
NC pin
12
VCONT
The external PNP-type transistor’s base control pin
13
VCC
Supply voltage pin. Operating supply voltage range is 6.0 to 40 V.
14
CRES
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 µs typ. tr = 10 µs typ. at open)
15
VNMIadj
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)} × V NMIadj. Unit for R2, R3: kΩ
16
NMI
NMI signal output pin. Connect to pin NMI of the microcomputer
17
RES
RES signal output pin. Connect to pin RES of the microcomputer
18
VSTBYadj
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)} × V STBYadj Unit for R4: kΩ
19
STBY
STBY signal output pin. Connect to pin STBY of the microcomputer
20
NC
NC pin
3
HA16103 FPJ/FPK
Block Diagram
+
VCONT
VCC 13
Voadj
8
12
9
VOUT
VOUT
5.34 kΩ
3.3 kΩ
2 kΩ Error
amplifier
19
STBY
Comparator
for STBY
Starter circuit
Reference
voltage
generator
Comparator
for RES
Delay
circuit
14
CRES
3.3 kΩ
16
Comparator
for NMI
NMI
18
2
VSTBYadj
P-RUN
Band-pass
filter circuit
3
Rf
4
1000 pF
4
Power on reset
and automatic
reset circuit
Watchdog
timer
Cf
15
VNMIadj
5
RR
6
CR
3.3 kΩ
17
RES
7
GND
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.
VBATT
Q1
VCC
R1
To microcomputer system
C1
100 µF
VCONT VOUT
5.34
Vout = (1+ R1 // 2.0 ) × Voadj ⋅ ⋅ ⋅ ⋅ Equation 1
(R1: kΩ)
(Voadj 1.31V)
HA16103
GND
Figure 1 Fine Adjustment Circuit of Output Voltage
5
I OUT = 0.1 A
0.5 A
4
1A
3
2
1
1
1:
Output voltage (V)
(Ta = 25°C)
0
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: Ω
200 m
(Ta = 25°C)
VCC = 12 V
180 m
Power-on time ton (s)
160 m
CR = 0.22 µF
140 m
120 m
100 m
80 m
CR = 0.1 µF
60 m
40 m
CR = 0.047 µF
20 m
0
100 k
200 k
Resistance RR (Ω)
Figure 3 Characteristic of Power-On Reset Circuit
6
500 k
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 : Ω
Runaway-detection minimum pulse width tmin (s)
2.0 m
1.8 m
1.6 m
(Ta = 25°C)
P—Run pulse duty ratio 50% (fixed)
VCC = 12 V
CR = 0.1 µF
RR = 180 k Ω
1.4 m
1.2 m
1.0 m
0.8 m
Cf = 0.022 µF
0.6 m
0.4 m
Cf = 0.01 µF
0.2 m
Cf = 0.0047 µF
100 k
200 k
500 k
Resistance Rf (Ω)
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
4.60 V
4.70 V
VO
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 = 25°C)
Ratings
Item
Symbol
HA16103FPJ HA16103FPK Units
VCC supply voltage
VCC
40
40
V
Control pin voltage
VCONT
40
40
V
Control pin current
I CONT
20
20
mA
VOUT pin voltage
VOUT
12
12
1
400*
V
2
Power dissipation
PT
400*
mW
Operating ambient temperature range
Topr
–40 to +85
–40 to +125
°C
Storage temperature range
Tstg
–50 to +125
–50 to +150
°C
Thermal resistance θj–a (°C/W)
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.
240
220
SOP20
without compound
200
40 mm
Board
180
160
140
120
100
80
0.8 t ceramic or
1.5 t epoxy
SOP20
using paste
containing
compound
(1)
0.5
1
2
(2)
5
(3)
10
20
Board thermal conductivity (W/m°C)
(1)
(2)
(3)
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 = 25°C, VCC = 12 V, VOUT = 5 V)
HA16103FPJ/FPK
Item
Regulator
Clock input
10
Symbol
Min
Typ
Max
Unit
Test Condition
Supply current
I CCL
—
8
12
mA
VCC = 12 V
Output voltage
VO1
4.80
5.00
5.20
V
VCC = 6 to 17.5 V
I OUT = 0.5 A,
R1 = 30 kΩ
VO2
4.70
5.00
5.30
V
VCC = 6 to 17.5 V
I OUT = 1 A, R1 = 30 kΩ
Line regulation
Voline
–50
—
50
mV
VCC = 6 to 17.5 V
I OUT = 1 A, R1 = 30 kΩ
Load regulation
Voload
–100
—
100
mV
I OUT = 10 mA to 0.5 A,
R1 = 30 kΩ
Ripple rejection
RREJ
45
75
—
dB
Vi = 0.5 Vrms,
fi = 1 kHz, R1 = 30 kΩ
Output voltage
Temperature
coefficient
δVO/δT
—
0.6
—
mV/°C
VCC = 12 V, R1 = 30 kΩ
“L”-input voltage
VIL
—
—
0.8
V
“H”-input voltage
VIH
2.0
—
—
V
“L”-input current
I IL
–120
–60
—
µA
VIL = 0 V
“H”-input current
I IH
—
0.3
0.5
mA
VIH = 5 V
HA16103 FPJ/FPK
Electrical Characteristics (Ta = 25°C, VCC = 12 V, VOUT = 5 V) (cont)
Item
NMI output
STBY
output
RES output
Low Voltage
protecton
Symbol
Min
Typ
Max
Unit
Test Condition
NMI pin
“L”-level voltage
VOL1
—
—
0.4
V
I OL1 = 2 mA
NMI pin
“H”-level voltage
VOH1
—
VO1
(VO2 )
—
V
NMI function start
VOUT voltage
VNMI
—
0.7
1.4
V
STBY pin
“L”-level voltage
VOL2
—
—
0.4
V
STBY pin
“H”-level voltage
VOH2
—
VO1
(VO2 )
—
V
STBY function start VSTBY
VOUT voltage
—
0.7
1.4
V
RES pin
“L”-level voltage
VOL3
—
—
0.4
V
RES pin
“H”-level voltage
VOH3
—
VO1
(VO2 )
—
V
RES function start
VOUT voltage
VRES
—
0.7
1.4
V
Power on time
t ON
25
40
60
ms
Clock off reset time t OFF
80
130
190
ms
Reset pulse
“L”-level time
t RL
15
20
30
ms
Rf = 180 kΩ, R R = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
Reset pulse
“H”-level time
t RH
37
60
90
ms
Rf = 180 kΩ, R R = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
Detection voltage(1) VH1
4.40
4.60
4.80
V
Detection voltage(1) VHYS1
Hysteresis width
50
100
150
mV
Detection voltage(2) VH2
2.9
3.2
3.5
V
Detection voltage(2) VHYS2
Hysteresis width
1.35
1.5
1.65
V
Reset
inhibit
pulse
Delay time restart
t RES
—
200
—
µs
CRES = 2200 pF
tr
—
200
—
µs
CRES = 2200 pF
I OL2 = 2 mA
I OL3 = 2 mA
Rf = 180 kΩ, R R = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
11
HA16103 FPJ/FPK
Electrical Characteristics (Ta = –40 to 125°C, VCC = 12 V, VOUT = 5 V, R1 = 30 k )
(cont)
HA16103FPK
Item
Regulator
Clock input
NMI output
STBY
output
RES output
Symbol
Min
Typ
Max
Unit
Supply current
I CC1
—
7
13
mA
Output voltage
Vout1
4.80
5.00
5.20
V
VCC = 6 to 17.5 V
I OUT = 0.5 A
Line regulation
Voline
–50
—
50
mV
VCC = 6 to 17.5 V
I OUT = 0.5 A
Load regulation
Voload
–100
—
100
mV
I OUT = 10 mA to 0.5 A
“L”-input voltage
VIL
—
—
0.4
V
“H”-input voltage
VIH
2.4
—
—
V
“L”-input current
I IL
–120
–60
—
µA
VIL = 0 V
“H”-input current
I IH
—
0.3
0.6
mA
VIH = 5 V
NMI pin
“L”-level voltage
VOLN
—
—
0.5
V
I OL1 = 2 mA
NMI pin
“H”-level voltage
VOHN
—
VOUT1
—
V
STBY pin
“L”-level voltage
VOLS
—
—
0.5
V
STBY pin
“H”-level voltage
VOHS
—
VOUT1
—
V
RES pin
“L”-level voltage
VOLR
—
—
0.5
V
RES pin
“H”-level voltage
VOHR
—
VOUT1
—
V
Power on time
t ON
25
40
60
ms
Rf = 180 kΩ, R R = 180 kΩ
Clock off reset time t OFF
70
130
200
ms
Cf = 0.01 µF, CR = 0.1 µF
Reset pulse
“L”-level time
t RL
15
20
30
ms
Rf = 180 kΩ, R R = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
Reset pulse
“H”-level time
t RH
30
60
100
ms
Rf = 180 kΩ, R R = 180 kΩ
Cf = 0.01 µF, CR = 0.1 µF
4.35
4.60
4.85
V
2.80
3.20
3.60
V
Low Voltage Detection voltage(1) VNMI
protecton
Detection voltage(2) VSTBY
12
Test Condition
I OL2 = 2 mA
I OL3 = 2 mA
HA16103 FPJ/FPK
Test Circuit
S1
2SB857D
Q1
VOUT
R1
C1
100 µ
VCONT VOUT Voadj
VNMIadj
VCC
NMI
HA16103
GND
P-RUN Rf
RR
RES
VSTBYadj
CR CRES
0.1 µ
0.01 µ
1000 p
VBATT
Cf
Counter
STBY
2200 p
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
100 µ
C1
R1
Q1
IGN,SW
VZ1
VCC
VCONT
VOUT
Q2
R2
Voadj
VNMIadj
NMI
R5
C2
HA16103
VZ2
GND
P-RUN R f
Cf
RR
0.01 µ
VBATT
1000 p
180 k
CR
0.1 µ
180 k
Q3
R3
NMI
STBY
STBY
RES
RES
VSTBYadj
CRES
VCC
H8/532
PORT GND
R4
CRES
2200 p
Unit
(1)
R: Ω
C: F
13
HA16103 FPJ/FPK
Sample Connection Circuit between HA16103 and H8/532 (2)
S1
C1
100 µ
Q1
IGN. SW
V Z1
Q2
R1
Q3
R2
VCC
VCONT VOUT Voadj
VNMIadj
R3
R5
HA16103
VCC
NMI
NMI
STBY
STBY
RES
RES
H8/532
C2
V Z2
GND
CLK
V STBYadj
Rf
Cf
RR
CR
PORT GND
C RES
R4
1000 p
180 k 0.01 µ 180 k 0.1 µ
2200 p
V BATT
V OUT
NMI
HA16103
1000 p
180 k
STBY
STBY
RES
RES
V STBYadj
Cf
RR
VCC
H8/532
GND
CLK Rf
NMI
CR
0.01 µ 180 k 0.1 µ
C RES
PORT GND
2200 p
Unit
14
R: Ω
C: F
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
Co
RL
IGN
Relay or other load
Wiring impedance
Figure 6 Typical Circuit
Vout
V
CC
Vcont
Wiring impedance
RES
C RES
+
–
GND
Figure 7 RES Comparator
15
HA16103 FPJ/FPK
Low-Voltage Reset Pulse Delay tRES (sec)
• Low-voltage inhibit section
Low-Voltage Reset Pulse Delay vs. CRES
3m
T a = 25°C
V CC = 12 V
R1 = 30 kΩ
2m
Rf = 360 kΩ
Rf = 560 kΩ
1m
Rf = 180 kΩ
0 1000 p
2000 p
3000 p
5000 p 7000 p 10000 p
C RES (F)
Permissible P-RUN Pulse Duty Cycle vs. P-RUN Pulse Frequency
20 k
10 k
P-RUN Pulse Frequency (Hz)
5k
Ta = 25°C
V IN = 12 V
2k
Runaway detected
at 100%
1k
Permissible P-RUN
duty cycle
500
200
A
B
100
duty =
50
B
× 100
A+B
20
10
0
20
40
60
80
P-RUN Pulse Duty Cycle (%)
16
100
HA16103 FPJ/FPK
Rf
=
56
0k
Ω
3m
Ta = 25°C
V CC = 12 V
R1 = 30 kΩ
=
36
0
kΩ
2m
Rf
Low-Voltage Reset Pulse Recovery Delay tr (sec)
• Low-voltage inhibit section
Low-Voltage Reset Pulse Recovery Delay vs. CRES
1m
Rf =
0 1000 p
2000 p
3000 p
C RES (F)
180
kΩ
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
Reset Low Time tRL (s)
120 m
100 m
80 m
F
2µ
60 m
40 m
=
CR
0.2
.1 µ
C
=0
R
20 m
.047 µ
C R= 0
0
100 k
F
200 k
300 k
Resistance RR (Ω)
F
500 k
17
HA16103 FPJ/FPK
• Power-on and auto-reset section
Clock-Off Time vs. Resistance RR
700 m
Clock-Off Time tOFF (s)
600 m
Ta = 25°C
V CC = 12 V
V OUT = 5 V typ
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
200 k
300 k
Resistance RR (Ω)
500 k
• Vref section
Output Voltage vs. Adjustment Resistance
5.30
Output Voltage VOUT (V)
5.20
Ta = 25°C
V CC = 12 V
5.10
5.00
4.90
4.80
4.70
0 10 k
18
100 k
VOUT Adjustment Resistance R1 (Ω)
1M
HA16103 FPJ/FPK
• Power-on and auto-reset section
Reset High Time vs. Resistance RR
280 m
260 m
240 m
Ta = 25°C
V CC = 12 V
V OUT = 5 V typ
Reset High Time tRH (s)
220 m
200 m
180 m
160 m
C R = 0.22 µF
140 m
120 m
C R = 0.1 µF
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
19
HA16103 FPJ/FPK
Package Dimensions
Unit: mm
12.6
13 Max
11
1
10
1.27
*0.42 ± 0.08
0.40 ± 0.06
0.10 ± 0.10
0.80 Max
*0.22 ± 0.05
0.20 ± 0.04
2.20 Max
5.5
20
0.20
7.80 +– 0.30
1.15
0° – 8°
0.70 ± 0.20
0.15
0.12 M
*Dimension including the plating thickness
Base material dimension
20
Hitachi Code
JEDEC
EIAJ
Mass (reference value)
FP-20DA
—
Conforms
0.31 g
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.
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Copyright ' Hitachi, Ltd., 1998. All rights reserved. Printed in Japan.
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