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ZXLD1101 PDF预览

ZXLD1101

更新时间: 2022-09-09 12:18:04
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美台 - DIODES 驱动器开关
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16页 222K
描述
ADJUSTABLE LED DRIVER WITH INTERNAL SWITCH IN TSOT23-5

ZXLD1101 数据手册

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ZXLD1101  
ELECTRICAL CHARACTERISTICS (at VIN = 3V, Tam b = 25°C unless otherwise stated(1)  
)
S YMBOL PARAMETER  
CONDITIONS  
MIN.  
TYP. MAX. UNIT  
V
In p u t vo lta g e  
S u p p ly cu rre n t  
Qu ie s ce n t  
2.5  
5.5  
V
IN  
I
IN  
V
= V , I = 0,  
60  
100  
A  
EN  
IN LX  
Ou tp u t n o t s w itch in g  
V = 0V  
EN  
S h u td o w n  
500  
109.5  
100  
1
nA  
m V  
nA  
V
FB p in co n tro l vo lta g e  
FB p in in p u t cu rre n t  
Op e ra tin g fre q u e n cy  
90.5  
350  
FB  
I
FB  
LX  
f
L=10H, V  
=10V,  
=10V,  
0.35  
500  
MHz  
OUT  
I
=20m A  
OUT  
T
T
LX o u tp u t 'OFF' tim e  
ns  
µs  
OFF  
ON  
(2)  
LX o u tp u t 'ON' tim e  
5
I
S w itch p e a k cu rre n t lim it  
L=10H, V  
=20m A  
320  
1.5  
m A  
LXp k  
OUT  
I
OUT  
R
S w itch 'On ' re s is ta n ce  
µA  
V
LX  
I
S w itch le a ka g e cu rre n t  
V
=20V  
1
LX(le a k)  
LX  
V
V
V
Co n tro lle r o u tp u t vo lta g e  
EN p in Hig h le ve l In p u t vo lta g e  
EN p in Lo w le ve l In p u t vo lta g e  
EN p in Lo w le ve l in p u t cu rre n t  
EN p in Hig h le ve l in p u t cu rre n t  
No rm a l o p e ra tio n  
De vice a ctive  
28  
OUT  
ENH  
ENL  
ENL  
ENH  
1.5  
V
V
IN  
De vice in s h u td o w n  
0.4  
-100  
1
V
I
I
V
V
V
=0V  
nA  
A  
µs  
EN  
EN  
EN  
=V  
IN  
(3)  
T
EN p in tu rn o ff d e la y  
s w itch e d fro m h ig h  
120  
EN(h o ld )  
to lo w  
PWM d u ty cycle ra n g e a t EN’ in p u t fo r  
filte re d PWM co n tro l  
10kHz < f < 100kHz,  
20  
100  
100  
%
T/T  
(4)  
V
=V  
ENH IN  
f
In te rn a l PWM lo w p a s s filte r cu t-o ff  
fre q u e n cy  
4
kHz  
LPF  
A
Filte r a tte n u a tio n  
f=30kHz  
f < 1kHz, V  
52.5  
dB  
%
LPF  
PWM d u ty cycle ra n g e a t EN’ in p u t fo r  
=V  
0
T/T  
ENH  
IN  
(5)  
‘g a te d ’ o u tp u t cu rre n t co n tro l  
NOTES:  
(1) Production testing of the device is perform ed at 25°C. Functional operation of the device over a -40°C to +85°C tem perature range is  
guaranteed by design, characterisation and process control.  
(2) Nom inal 'on' tim e (T  
) is defined by the input voltage (V ), coil inductance (L) and peak current (I  
) according to the expression:  
ONnom  
IN  
LXpkdc  
T
= {I  
) x L/V } +200ns.  
ONnom  
LX(pkdc IN  
(3) This is the tim e for which the device rem ains active after the EN pin has been asserted low. This delay is necessary to allow the output to be  
m aintained during dc PWM m ode operation.  
(4) The m inim um PWM signal frequency during this m ode of operation is to ensure that the device rem ains active during PWM control. This  
provides a continuous dc output current. For lower frequencies, the device will be gated 'on' and 'off' during PWM control.  
(5) The m axim um PWM signal frequency during this m ode of operation should be kept as low as possible to m inim ise errors due to the turn-off  
delay of the device (see Enable pin turn-off delay).  
ISSUE 4 - J ULY 2004  
S E M IC O N D U C T O R S  
3

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