DM13H Datasheet, PDF (13/26 Pages) Silicon Touch Technology Inc. – Maximum output voltage: 17V

CD Mode Data Format
DM13H
a. Global Brightness Control
DM13H offers a convenient way to fine tune the whole chip output currents for the
uniformity of brightness between modules, ICs or the accomodation to ambient light. To
further adjust the current level linearly, the system shall enter the CD MODE and then shift
in 7-bit GBC data code through DAI pin. The MSB should be shifted-in first. Take the input
code. G[6:0]= (MSB)1001011(LSB) for example. The new current is then equal to the base
current multiplied by the ratio
(2⁶
+
3
2
+
1
2
+
0
2
+
1)
128 . The 7-bit data won’t be changed until the
next new data is latched. Note that the default code 7’b1000000 exists in chip memory
when power on, so the output current is equal to the half of base current.
b. Short detection voltage level selection
DM13H provides 2 voltage levels in coordination with LED short detection on system.
VCC voltage level is the default value while power-on. DAO will send an error signal = H if
the output voltage is greater than a respectively predetermined threshold value.
SV
Short Voltage
0 5/6 * VCC
1 VCC (default)
c. Sleep mode
When SLP=1, DM13H will enter sleep mode, all outputs turn off and the IDD of DM13H
will drop down to less than 5uA. This function is especially designed for battery or solar
powered system.
16-Channel Constant Current LED Driver with Error Detection
Version:A.004
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