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STEVAL-ILL046V1 Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte STEVAL-ILL046V1
Spiegazioni elettronici  Internal current limiting
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STEVAL-ILL046V1 Scheda tecnica(HTML) 1 Page - STMicroelectronics

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May 2016
DocID024104 Rev 2
1/4
For further information contact your local STMicroelectronics sales
office
www.st.com
STEVAL-ILL046V1
HB LED driver with inhibit based on the ST1CC40 in a QFN
package
Data brief
Features
3 to 18 V operating input voltage range
850 kHz fixed switching frequency
100 mV (typ) current sense voltage drop
6 µA standby current in inhibit mode
±7% output current accuracy
Synchronous rectification
Embedded compensation network
Internal current limiting
Ceramic output capacitor compliant
Thermal shutdown
RoHS compliant
Description
The STEVAL-ILL046V1 evaluation board is
based on the ST1CC40, which is an 850 kHz
fixed switching frequency monolithic step-down
DC-DC converter designed to operate as a
precise constant current source with an
adjustable current capability of up to 3 A DC.
In closed loop operation, the ST1CC40 feedback
pin voltage is 100 mV thus the sensing resistor
calculation is expressed as Rs = 100 mV/ILED.
The STEVAL-ILL046V1 is provided with 660 mA
by connecting a 150 mW sensing resistor to the
feedback pin.
The overall application size is minimized, thanks
to the high switching frequency and ceramic
output capacitor compatibility.
The STEVAL-ILL046V1 evaluation board is fully
protected against overheating, overcurrent and
output short-circuit.
The inhibit mode minimizes the current
consumption in standby (6 µA) to maximize
battery life in portable devices.


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