HV9901
Universal Relay Driver
Features
•
•
•
•
•
•
10V to 450V Input Voltage Range
Energy-saving Hold Current Mode
Adjustable Microcontroller Supply
Low Supply Current <1 mA
Constant-current Coil Drive
Programmable Pull-in Current, Pull-in Time and
Hold Current
General Description
The HV9901 universal relay driver provides high-effi-
ciency driving for low-voltage relays with supply volt-
ages as high as 450V. For example, a relay with a 5V
coil can be driven directly from the rectified 120 VAC or
230 VAC line.
The IC includes two high-voltage linear regulators. The
first one is for providing power to internal control cir-
cuitry. The second one has an adjustable output volt-
age and a 1 mA output current capability to support
external circuitry, such as a microcontroller control cir-
cuit.
The pull-in current, pull-in time and hold current for the
relay are individually programmable through two resis-
tors and a capacitor. PWM switching can be synchro-
nized with an external clock or with another HV9901
operating at a higher frequency.
The relay is operated through the enable input ENI.
Logic polarity is under control of the polarity input POL.
Audible noise coming from the relay can be sup-
pressed by operating at a PWM frequency exceeding
20 kHz.
Applications
•
•
•
•
Industrial Controls
Relay Timers
Solenoid Drivers
Home Automation
Package Type
16-lead SOIC
1
16
4
See
Table 2-1
for pin information.
WARNING
The HV9901 is suited for relay driving applications operating at hazardous voltage. Ensure that adequate
safeguards are provided to protect the end user from electrical shock.
2016 Microchip Technology Inc.
DS20005550A-page 1
HV9901
Functional Block Diagram
1
VIN
VDD
UVLO
16
4.7μF
+
-
A
C
Bandgap
1.25V
Reference
VREF
15
100 nF
R
HDA
R
LED
1N4937
14
RELAY
2R
10K
VDD
HOLD/DELAY
C
HD
R
HDB
4
VN2460N8
GT
S
FB
VDD
13
R
FBB
215ns
Delay
CS
5.5 kΩ
Delay
Q
R
R
-
+
1.25V
R
FBA
100 nF
5
-
C
HD
+
Low Limit
High Limit
VCC
12
5.0V
R
S
µP
VDD
-
C
+
6
COM
VDD
40μA
ENI
11
Oscillator
shutdown
7
R
OSC
SYNC
High Duty
Cycle
Oscillator
ENO
10
9
8
RT
POL
DS20005550A-page 2
2016 Microchip Technology Inc.
HV9901
Typical Application Circuit
V
IN
VIN
VDD
HV9901
INT
REG
V
REF
PWM
SYNC
GT
CS
RT
SYNC
VREF
H/D
V
CC
VCC
AUX
REG
POL
ENO
ENI
Enable Polarity
FB
Enable
2016 Microchip Technology Inc.
DS20005550A-page 3
HV9901
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
†
Input Voltage, V
IN
1
....................................................................................................................................–0.5V to 470V
Input Voltage to any other Pin
1
........................................................................................................ –0.3V to V
DD
+ 0.3V
Operating Junction Temperature Range ................................................................................................ –40°C to +85°C
Continuous Power Dissipation (T
A
= +25°C)
2
.................................................................................................... 750 mW
† Notice:
Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is
a stress rating only, and functional operation of the device at those or any other conditions above those indicated in the
operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods
may affect device reliability.
Note 1:
All voltages are referenced to GND.
2:
For operation above 25°C ambient, derate linearly at 7.5 mW/°C.
ELECTRICAL CHARACTERISTICS
Electrical Specifications:
T
A
= 25°C unless otherwise noted.
Parameter
HIGH-VOLTAGE REGULATOR
Input Voltage
Supply Current
Symbol
V
IN
I
IN
Min.
10
—
Typ.
—
—
Max.
450
2
Unit
V
mA
Conditions
I
CC
= 0 mA to 1 mA load
No load at V
DD
(Note
1)
load at I
CC
= 1 mA,
C
GT
= 500 pF, f
OSC
= 25 kHz
No load at V
DD
(Note
1)
C
GT
= 500 pF, f
OSC
= 25 kHz
Internal Supply Voltage
V
DD
8.5
7.8
—
2
0
0
—
1.2
—
—
—
—
9
8.2
0.5
—
—
V
REF
25
1.25
—
10
—
—
9.5
8.5
—
5.5
1
V
DD
–1V
100
1.3
7
15
1
20
V
V
V
V
mA
V
nA
V
mV
mV
mA
μA
V
DD
UVLO, On
UVLO
(ON)
V
DD
UVLO, Hysteresis
UVLO
(HYST)
ADJUSTABLE REGULATOR
Regulator Output Voltage
V
CC
Range
Regulator Output Current
I
CC
Feedback Voltage
V
FB
Input Bias Current
I
FB
REFERENCE
Bandgap Reference Voltage
V
REF
Load Regulation
Line Regulation
Short Circuit Current
I
REF(SHORT)
Reference Voltage Sink
I
REF(SINK)
Current
I
CC
= 1 mA load
No load at V
DD
(Note
1)
V
FB
= V
REF
T
A
= –40°C to +85°C
0 mA < I
REF
< 0.3 mA
8.5V < V
DD
< 9.5V
DS20005550A-page 4
2016 Microchip Technology Inc.
HV9901
ELECTRICAL CHARACTERISTICS (CONTINUED)
Electrical Specifications:
T
A
= 25°C unless otherwise noted.
Parameter
OSCILLATOR
PWM Oscillator Frequency
Temperature Coefficient
Oscillator SYNC Frequency
SYNC Sourcing Current
SYNC Sinking Current
SYNC Input Logic Low
Voltage
PWM
Maximum Duty Cycle
Blanking Time
MOSFET DRIVER
Gate Drive Output High
Gate Drive Output Low
Rise Time
Fall Time
CURRENT SENSE
Current Sense Voltage,
High Limit
Current Limit Delay to GT,
High Limit
Input Bias Current
Low Limit Comparator Input
Offset Voltage
Current Limit Delay to GT,
Low Limit
Hold/Delay Output Voltage
Hold/Delay Input Bias Cur-
rent
Shutdown Delay
Enable Input Voltage - High
Enable Input Voltage - Low
Enable Input Current - High
Enable Input Current - Low
Polarity Voltage - High
Polarity Voltage - Low
Polarity Current - High
Polarity Current - Low
Enable Output Voltage -
High
Enable Output Voltage -
Low
Symbol
f
OSC
—
f
SYNC
I
SYNC
I
SYNC
V
SYNC
Min.
20
80
—
—
20
1
—
Typ.
25
100
170
—
—
—
—
Max.
35
140
—
150
55
—
1
Unit
kHz
R
T
= 1 MΩ
Conditions
kHz
R
T
= 226 kΩ
ppm/°C T
A
= –40°C to +85°C
kHz
μA
mA
V
SYNC
= 0.1V
V
D
MAX
t
BLNK
V
GTH
V
GTL
t
R
t
F
V
CS(HL)
t
DELAY(HL)
I
CS
V
OS
t
DELAY(LL)
V
HOLD/DEL
I
HOLD/DEL
t
ENI
V
ENI
I
ENI
V
POL
I
POL
V
ENO
96.5
86.5
150
V
DD
–0.3
—
—
—
0.775
—
—
—
—
V
DD
–0.4
—
—
0.7 V
CC
0
—
–5
0.7 V
CC
0
—
–5
0.9 V
CC
0
—
—
215
—
—
30
30
0.833
200
25
—
200
—
25
50
—
—
1
–1
—
—
1
–1
—
—
99.5
97.5
280
—
0.3
50
50
0.891
250
1000
±60
250
—
500
100
V
CC
0.3 V
CC
5
—
V
CC
0.3V
CC
5
—
V
CC
0.1 V
CC
%
%
ns
V
V
ns
ns
V
ns
nA
mV
ns
V
nA
ns
V
V
μA
μA
V
V
μA
μA
V
V
R
T
= 1 MΩ
R
T
= 226 kΩ
I
OUT
= 10 mA
I
OUT
= –10 mA
C
GT
= 500 pF
50 mV overdrive
POL = Low, ENI = Low
50 mV overdrive
I
HOLD/DEL
(sourcing)–100
μA
POL = Low, ENI = Low
POL = Low, ENI = Low
2V < V
CC
< 5.5V
Note 1:
Maximum allowable load current limited by power dissipation and operating ambient temperature
2016 Microchip Technology Inc.
DS20005550A-page 5
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