Diodes ZXLD1321 - Manual (Page 7)

ZXLD1321
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
M_VIN
Supply voltage 3 18 V
V
MON
Sense voltage =V(M_VIN) – 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 VMON=10mV
VMON=100mV 370
150 ppm/
K
BW Bandwidth VMON=10mV
VMON=100mV 350
2.5
KHz
MHz
Gm Transconductance
⌬
Iout/⌬VMON
1 mA/V
Acc Accuracy RM = 0.1
Ω
VMON = 100mV
-3 3 %
Symbol Parameter Conditions Min Typ Max Units
VADJ Adjust Voltage 0 500 mV
TCO
(MON) Temperature Coefficient VADJ=50mV
VADJ=500mV 160
200 ppm/
K
BW Bandwidth VADJ=50mV
VADJ=500mV 275
3
KHz
MHz
Gm Transconductance
⌬
Iout/⌬V
ADJ
200 µA/V
Acc Accuracy VADJ=500mV -3 3 %
Symbol Parameter Conditions Min Typ Max Units
VT
ADJH
Upper threshold voltage Onset of output current
reduction (VTADJ falling) 75 mV
VT
ADJL
Lower threshold voltage Output current reduced to
<10% of set value
(VTADJ falling) 50 mV
Gm
(TADJ)
Transconductance
⌬
Iout/⌬VTADJ
4 mA/V