pca9901 NXP Semiconductors, pca9901 Datasheet - Page 15

• Manufacturer Part Number: pca9901
• Description: One Wire Single Led Driver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 5.
V
12. Dynamic characteristics
Table 6.
V
[1]
[2]
PCA9901_1
Product data sheet
Symbol
ISET pin
V
ΔV
ΔI
I
Thermal shutdown
T
T
Symbol
CTRL pin
t
t
t
t
LEDOUT pin
t
t
ΔT
Oscillator
Δf
LED
WH(CTRL)
WL(CTRL)
decod(cmd)
w(spike)
WH(LEDOUT)
WL(LEDOUT)
DD
DD
sd
sd(hys)
ISET
O
osc
LED
ISET
/I
/I
LED ON-time resolution.
LED OFF-time resolution.
= 2.7 V to 5.5 V; T
= 2.7 V to 5.5 V; T
exp
/f
ISET
osc
/V
ISET
Static characteristics
Dynamic characteristics
Parameter
pulse width HIGH on pin CTRL
pulse width LOW on pin CTRL
command decode time
spike pulse width
pulse width HIGH on pin LEDOUT
pulse width LOW on pin LEDOUT
LED period variation
relative oscillator frequency variation
Parameter
voltage on pin ISET
relative voltage variation on
pin ISET
output current variation to
expected current ratio
LED current to ISET current
ratio
shutdown temperature
hysteresis of shutdown
temperature
amb
amb
=
=
−
−
40
40
°
°
C to +85
C to 85
…continued
°
C; unless otherwise specified.
°
C; unless otherwise specified.
Rev. 01 — 3 December 2009
Conditions
I
linearity of I
I
guaranteed by design
guaranteed by design
LEDOUT
LEDOUT
Conditions
command pulse ON
command pulse OFF
minimum LED ON period
minimum LED OFF period
internal oscillator clock cycle
over temperature;
guaranteed by design
= 5 mA to 20 mA
= 5 mA to 20 mA
LED
/ ISET function
[1]
[2]
Min
-
−10
−2
-
-
-
Min
2
2
-
-
-
-
−200
-
One wire single LED driver
Typ
1.23
-
-
400
125
15
Typ
-
-
1.5
25
1
20
-
5
PCA9901
© NXP B.V. 2009. All rights reserved.
Max
-
+10
2
-
-
-
Max
50
75
-
-
±1 %
±1 %
+200
-
15 of 27
Unit
V
%
%
°C
°C
Unit
μs
μs
ms
ns
ms
ms
μs
%