zxld1322 Zetex Semiconductors plc., zxld1322 Datasheet - Page 7

• Manufacturer Part Number: zxld1322
• Description: Buck/boost Mode Dc-dc Converter For Led Driving With 700ma Output And Current Control
• Manufacturer: Zetex Semiconductors plc.

High-side current monitor
Reference current monitor
LED thermal control circuit (TADJ) parameters
Issue 1 - January 2008
© Zetex Semiconductors plc 2008
Symbol
V
V
I_
TCO
(MON)
BW
Gm
Acc
Symbol
V
TCO
(MON)
BW
Gm
Acc
Symbol
VT
VT
Gm
ADJ
M_VIN
MON
M_VIN
ADJH
ADJL
(TADJ)
Parameter
Supply voltage
Sense voltage
Input current
Temperature coefficient
Bandwidth
Transconductance
Accuracy
Parameter
Adjust voltage
Temperature coefficient
Bandwidth
Transconductance
Accuracy
Parameter
Upper threshold voltage
Lower threshold voltage
Transconductance
Iout/ VMON
Iout/ V
Iout/ VTADJ
ADJ
Conditions
Onset of output current
reduction (VTADJ falling)
Output current reduced to
<10% of set value
(VTADJ falling)
Conditions
Measured into M_VIN pin
VMON=10mV
VMON=100mV
VMON=100mV
RM = 0.1Ω
VMON = 100mV
Conditions
VADJ=50mV
VADJ=500mV
VADJ=50mV
VADJ=500mV
=V(VIN) – VM_VIN
VMON=10mV
VADJ=500mV
7
Min
Min
Min
2.5
-3
-3
0
0
0.08
Typ
Typ
100
370
150
350
160
200
275
200
Typ
2.5
75
50
ZXLD1322
1
3
4
www.zetex.com
Max
Max
Max
200
500
18
1
3
3
Units
mA/V
Units
ppm/
ppm/
Units
mA/V
µA/V
MHz
MHz
KHz
KHz
mV
mV
mV
mV
µA
%
%
V
K
K