TLC5944 Datasheet, PDF (9/34 Pages) Texas Instruments – 16-Channel, 12-Bit PWM LED Driver with 6-Bit Dot Correction and Pre-Charge FET

TLC5944
www.ti.com ...................................................................................................................................................................................................... SBVS112 – JUNE 2008
PARAMETER MEASUREMENT INFORMATION
PIN EQUIVALENT INPUT AND OUTPUT SCHEMATIC DIAGRAMS
VCC
VCC
INPUT
SOUT
GND
Figure 1. SIN, SCLK, XLAT, DCSEL, BLANK, GSCLK
XERR
TEST CIRCUITS
GND
Figure 3. XERR
V_CC
IREF
R_IREF
VCC
OUTn
GND
R_L
C_L(1)
V_LED
GND
Figure 2. SOUT
OUTn
GND
Figure 4. OUT0 Through OUT15
VCC
V_CC
SOUT
GND
C_L(1)
(1) C_L includes measurement probe and jig
capacitance.
Figure 5. Rise Time and Fall Time Test Circuit for OUTn
(1) C_L includes measurement probe and jig
capacitance.
Figure 6. Rise Time and Fall Time Test Circuit for SOUT
V_CC
VCC
XERR
GND
R_{L XERR}
C_L
(1)
XERR
V_XERR
(1) C_{L XERR} includes measurement probe and jig capacitance.
Figure 7. Fall Time Test Circuit for XERR
V_CC VUP
VUP VCC
OUTn
GND
R_{L PRE}
C_L
Figure 8. Delay Time Test Circuit for Pre-Charge FET
VCC OUT0
V_CC
IREF
OUTn
VUP V_CC
VCC VUP OUT0
IREF
OUTn
R_IREF
GND OUT15
VOUT_FIX
VOUTn
R_IREF
GND OUT15
VOUT_FIX
VOUTn
Figure 9. Constant Current Test Circuit for OUTn
Figure 10. Leakage Current of Pre-Charge FET Test
Circuit for OUTn
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