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LED1642GW Datenblatt(PDF) 5 Page - STMicroelectronics

Teilenummer LED1642GW
Bauteilbeschribung  16 channel LED driver with error detection current gain control
PDF  42 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
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LED1642GW Datenblatt(HTML) 5 Page - STMicroelectronics

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LED1642GW
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42
List of figures
Figure 1.
TSSOP24, TSSOP24EP, QSOP-24 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2.
QFN-24 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3.
Typical chip-to-chip accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 4.
Typical application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 5.
Timing for clock, serial in, serial out, latch enable and outputs. . . . . . . . . . . . . . . . . . . . . . 14
Figure 6.
LED1642GW simplified block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 7.
Input and output equivalent circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8.
Digital keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 9.
Channel data and write switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 10.
Channel current vs. gain register value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 11.
Error detection action sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 12.
Error detection power-on timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 13.
Configuration register reading sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 14.
Configuration register reading sequence (zoom) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15.
Configuration register reading sequence - SDO delay actives . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16.
Configuration register reading sequence - SDO delay actives (zoom) . . . . . . . . . . . . . . . . 23
Figure 17.
Output TON (current rise time) CFG -12 = CFG - 11 = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 18.
Output TOFF (current fall time) CFG - 2 = CFG - 11 = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 19.
Output TON (current rise time) CFG -12 = CFG - 11 = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 20.
Output TOFF (current fall time) CFG -12 = CFG - 11 = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 21.
SDO delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 22.
Gradual output delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 23.
PWCLK counter and comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 24.
Brightness register setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 25.
Thermal flag status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 26.
Typical channel dropout voltage vs. output current (VDD = 3.3 V). . . . . . . . . . . . . . . . . . . 30
Figure 27.
QSOP-24 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 28.
QFN-24 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 29.
TSSOP24 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 30.
TSSOP24 exposed pad outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 31.
TSSOP24 and TSSOP24 exposed pad tape and reel outline . . . . . . . . . . . . . . . . . . . . . . 39



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