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AS1720 Datasheet(PDF) 2 Page - ams AG |
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AS1720 Datasheet(HTML) 2 Page - ams AG |
2 / 12 page www.austriamicrosystems.com/Solenoid-Relay-Driver/AS1720 Revision 1.04 2 - 12 AS1720 Datasheet - P i n A s s i g n m e n t s 4 Pin Assignments Figure 2. Pin Out (Top View) Pin Description Table 2. Pin Descriptions Pin Name Pin Number Description VDDHV 1 Positive supply voltage VDDA 2 Internal supply of 3.3V (typ.) DUTY 3 Duty-Cycle. By means of this pin the duty cycle can be adjusted between 20% and 90% during hold phase. The duty cycle can be adjusted by a voltage source or an external resistor divider. Setting this pin to VDDA the 50% duty cycle is selected automatically. OUT 4 Current Source Output VSS 5 Ground IE 6 Energize Current. This pin defines the current during energize phase by means of a resistor. IH 7 Hold Current. This pin defines the current during hold phase by means of a resistor. ENN 8 Enable Not. This pin can be used to switch on/off the current source (e.g. via a P), when the AS1720 is always powered on. Low during start-up: When VDDHV is applied, the device starts with the energise phase, followed by the hold phase. When the device is constantly powered on, it can be controlled by this pin. High: The output current source is switched off. Low: The device starts with the energise phase, followed by the hold phase. 1 VDDHV AS1720 2 VDDA 3 DUTY 4 OUT 8 ENN 7 IH 6 IE 5 VSS |
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