A1610 Alpha Microelectronics, A1610 Datasheet - Page 3

• Manufacturer Part Number: A1610
• Description: Coil Driver ic
• Manufacturer: Alpha Microelectronics

Pin Definition
Lead Definition
General function and description
The À1610 combined with an external N-channel power MOSFET serves for the low loss control of
electrical magnetic actuators like relays or magnets and similar kinds of coils. It is especially suitable in
automotive applications.
It is designed for a power supply range from 8 to 45 V.
As protection against reverse polarity of the supply voltage the IC is supplied with an internal dumping
diode D1 in the supply voltage connection (forward voltage approx. 0.6 V).
The chip generates two internally stabilized voltages.
There are a 5 V-voltage source for the digital logic and a 12 V-voltage source for the push-pull drivers.
The chip realizes protection against undervoltage of VDD (VDD-Undervoltage Lockout), undervoltage of
O5V (O5V-Undervoltage Lockout), overvoltage of VDS of the external transistor M4 and against
overtemperature (Thermal Shutdown).
The outputs of the Undervoltages Lockout of VDD and O5V are logical AND combined.
VDD
At start up of the supply voltage the output of VDD-Undervoltage Lockout switches to "High" at about
V
If the voltage VO5V rises to the switching threshold at 4 V, the "power on reset" of the logic will finish and
the output of the O5V-Undervoltage Lockout goes to "High".
The output of the Error Logic switches to "High" if no overtemperature is detected.
Concurrent the dynamic input will be released and triggers the Enable Driver for the push pull drivers.
The output of the Error Logic switches to "Low", if the supply voltage V
The Output OUT and the input IN switch to "Low" and the logic enables power on reset.
The undervoltage detection senses the voltage at V
capacitor C
Short-term drops of supply voltage V
undervoltage detector.
October 2000
DD
Pin
10
11
12
14
15
16
17
18
1
2
3
8
9
7.6 V.
O12V
OVP
OUT
OD
O5V
INPT
IRCR
OSC
GNDA
IN
VDDC
VDD
GNDD
DDC
Symbol
is to take into account.
Designation
Reference Voltage Output 12 V
Overvoltage Protection Input for external N-Kanal Power MOSFET
Output
Output Diode Temperature Sensor
Reference Voltage Output 5 V
Resistor R
Resistor R
Capacitor C
GND-Analog
Input
Block Capacitor
Supply Voltage
GND-Digital
DD
below the switching threshold of 7 V do not actuate the
PT
REF
alpha microelectronics gmbh
OSC
for Overtemperature Protection
for Current Reference
for Oscillator Frequency
DDC
. With it the integrational effect of the back-up
DD
decreases under a value of 7 V.
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