The R1580 is a 34-V constant-current LED driver controller. Internally, this device consists of a linear dimming controller using a PWM input signal, a thermal shutdown circuit (TSD), and an undervoltage lockout circuit (UVLO) in addition to the basic constant-current control circuits. A flicker-free wide-dimming constant-current LED driver can be configured by only adding an Nch MOSFET, a current sensing resistor and capacitors to the R1580. The FET to control current flow is placed externally, so that the R1580 will not give any influence on the current range capable of dealing with. The R1580 is linear dimmable with using a PWM signal on the DIM pin. The R1580 is capable of performing a constant-current control corresponding to the different PWM duty cycles. The R1580N002A is linear dimmable as low as 0.5% PWM duty cycle and the R1580N001A/ R1580N003A is linear dimmable as low as 1% PWM duty cycle. Unlike other LED drivers with PWM dimming, the R1580 can provide a smooth flicker-free dimming operation using linear dimming.
|Input Voltage Range (Max. Rating)||3.6 V to 34.0 V (36.0 V)|
|Operating Temperature Range||-40°C to 85°C|
|Supply Current||Typ. 320 µA|
|Standby Current||Typ. 140 µA (R1580N001A/ R1580N002A)
Typ. 28 µA (1580N003A)
|Line Regulation||Typ. 0.01%/V|
|Thermal Shutdown Protection||Thermal Shutdown Temperature: Typ. 160°C|
|Control Type||Linear Dimmable Using a PWM Signal|
Comparison of Digital Image
Linear Dimming (R1580)
PRODUCT LONGEVITY PROGRAM
R1580 series operate PRODUCT LONGEVITY PROGRAM.
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.
The interface of the DIM pin and the voltage level of the ISET pin are user-selectable options.
|Product Name||Package||Quantity per Reel|
|ISET Pin Voltage||DIM Pin Interface|
|001||0.4 V||Comparator Input|
|002||0.8 V||Comparator Input|
|003||0.4 V||Inverter Input|