Diodes ZXLD1320 - Manual (Page 7)

ZXLD1320
Issue 1 - January 2008 7 www.zetex.com
© Zetex Semiconductors plc 2008
High-side current monitor
Reference current monitor
LED thermal control circuit (TADJ) parameters
Symbol Parameter Conditions Min Typ Max Units
V
MVIN
Supply voltage 4 18 V
V
MON
Sense voltage =V
(IN)
– V
(M_LOAD)
0 100 200 mV
I
M_LOAD
Input current Measured into M_LOAD pin 0.08 1 µA
TCO
(MON)
Temperature coefficient V
MON
=10mV
V
MON
=100mV
370
150 ppm/
K
BW Bandwidth V
MON
=10mV
V
MON
=100mV
350
2.5
KHz
MHz
Gm Transconductance
⌬Iout/⌬VMON 1 mA/V
Acc Accuracy R
M
= 0.1
Ω
V
MON
= 100mV
-3 3 %
Symbol Parameter Conditions Min Typ Max Units
V
ADJ
Adjust voltage 0 500 mV
TCO
(MON)
Temperature coefficient V
ADJ
=50mV
V
ADJ
=500mV
160
200 ppm/
K
BW Bandwidth V
ADJ
=50mV
V
ADJ
=500mV
275
3
KHz
MHz
Gm Transconductance
⌬Iout/⌬V
ADJ
200 µA/V
Acc Accuracy V
ADJ
=500mV -3 3 %
Symbol Parameter Conditions Min Typ Max Units
VT
ADJH
Upper threshold voltage Onset of output current
reduction (V
TADJ
falling)
75 mV
VT
ADJL
Lower threshold voltage Output current reduced to
<10% of set value
(V
TADJ
falling)
50 mV
Gm
(TADJ)
Transconductance
⌬Iout/⌬VTADJ 4 mA/V