PCA9685 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 4 — 16 April 2015 43 of 52
NXP Semiconductors
PCA9685
16-channel, 12-bit PWM Fm+ I
2
C-bus LED controller
14. Test information
R
L
= Load resistor for LEDn.
C
L
= Load capacitance includes jig and probe capacitance.
R
T
= Termination resistance should be equal to the output impedance Z
o
of the pulse generators.
Fig 34. Test circuitry for switching times
R
L
= Load resistor for LEDn.
C
L
= Load capacitance includes jig and probe capacitance.
R
T
= Termination resistance should be equal to the output impedance Z
o
of the pulse generators.
Test data are given in Tab le 16
.
Fig 35. Test circuitry for switching times for enable/disable
Table 16. Test data for enable/disable switching times
Test Load Switch
C
L
R
L
t
PD
50 pF 500 open
t
PLZ
, t
PZL
50 pF 500 V
DD
2
t
PHZ
, t
PZH
50 pF 500 V
SS
PULSE
GENERATOR
V
O
C
L
50 pF
R
L
500 Ω
002aab880
R
T
V
I
V
DD
DUT
V
DD
open
V
SS
PULSE
GENERATOR
V
O
C
L
50 pF
R
L
500 Ω
002aad811
R
T
V
I
V
DD
DUT
R
L
500 Ω
V
DD
× 2
open
V
SS
S1
