STLD20CP1PQR STMicroelectronics, STLD20CP1PQR Datasheet - Page 10

• Manufacturer Part Number: STLD20CP1PQR
• Description: IC LED DRIVR BCKLGT FLASH 16-QFN
• Manufacturer: STMicroelectronics
• Type: Backlight, Flash, Movier

Specifications of STLD20CP1PQR

• Topology: PWM, Step-Up (Boost), Switched Capacitor (Charge Pump)
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: Backlight, Flash/Torch
• Type - Secondary: White LED
• Frequency: 1.3MHz
• Voltage - Supply: 2.8 V ~ 6 V
• Voltage - Output: 17V
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Operating Temperature: -40°C ~ 85°C
• Internal Switch(s): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• Efficiency: -
• Other names: 497-6924-2; STLD20CP1PQR

Figure 5.
Figure 6.
Figure 7.
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PWM dimming method from 0% to 60%
Likewise, by forcing DM1 low and applying a PWM signal on pin DM2, is it possible to
achieve dimming from 0 to 5%
DM2, the device performs dimming from 60% to 100%
PWM dimming method from 0% to 5%
PWM dimming method from 60% to 100%
The third way is to utilize single-wire pulse dimming by connecting DM1 and DM2 together.
This feature allows the selection of additional steps of LED current through a digital signal
coming from the microprocessor, reducing the number of control traces on the PCB. When
the DM1 and DM2 are simultaneously high, the high current value is selected on the LEDs,
and each additional pulse reduces the LED current by 10%. After the tenth pulse, the LED
(Figure
6), while putting DM1 high and the PWM signal on
(Figure
7).