ZXLD1321DCATC Diodes Zetex, ZXLD1321DCATC Datasheet - Page 5

• Manufacturer Part Number: ZXLD1321DCATC
• Description: IC LED DRVR WHITE BCKLGT 14-TDFN
• Manufacturer: Diodes Zetex
• Type: Backlight, White LEDr

Specifications of ZXLD1321DCATC

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Flash/Torch
• Type - Secondary: High Brightness LED (HBLED), White LED
• Frequency: 600kHz
• Voltage - Supply: 2 V ~ 12 V
• Mounting Type: Surface Mount
• Package / Case: 14-TDFN
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 85%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: ZXLD1321DCATR

Electrical characteristics (
DC-DC converter supply parameters
NOTES:
(a) Production testing of the device is performed at 25 C. Functional operation of the device and parameters specified from -40 C to
(b) Between 1.2V and 2.2V the device will run in the Low Voltage Startup Mode (for details refer to section "Low Voltage Operation")
DC-DC converter input parameters
Issue 1 - January 2008
© Zetex Semiconductors plc 2008
Symbol
V
V
V
V
Iq
I
V
TCO
Symbol
V
V
(SU)
I
C
V
V
TCO
R
VADJ(clmp) Clamp voltage on ADJ pin
STBY
SENSE
ADJ
ADJ(th)
IN
IN
UV-
UV+
REF
SENSE
SENSE
FB
ADJ
+125 C are guaranteed by design, characterisation and process control.
(Start)
(VADJ)
(REF)
Parameter
Supply voltage
Supply voltage for start-up
Under-voltage detection threshold
Normal operation to start-up mode
Under-voltage detection threshold
Start-up mode to normal operation
Quiescent current
Standby current
Internal reference voltage
Internal reference temperature
coefficient.
Parameter
Peak switch current sense
voltage
Peak switch current sense
voltage in start-up mode
Sense input current
Control loop compensation
capacitor
External dc control voltage
applied to ADJ pin to adjust
output current
Switching threshold of ADJ
pin
Temperature coefficient of
VADJ(th)
Internal resistor between
VREF and ADJ
Test conditions: VIN = 3V, T
(b)
Conditions
Measured on ISENSE
pin CFB pin at 0V
Measured on ISENSE
pin.
Start-up mode
VIN=1.2V
Measured into
ISENSE with pin at
0V. CFB pin at 0V
DC brightness
control mode
Standby state to
normal operation
VADJ<500mV
100µA injected into
ADJ pin
Conditions
Normal operation
Start-up mode
VIN falling
VIN rising
Measured into VIN
ADJ pin floating.
(Excluding switch
base current).
Measured into VIN.
ADJ pin grounded
ADJ pin floating
2.0V<VIN<18V
5
AMB
= 25 C unless otherwise stated
Min
Min
480
-15
2.0
1.2
45
50
26
10.5
+0.3
Typ
100
575
Typ
500
55
10
28
1.8
2.2
1.5
-7
12
50
ZXLD1321
www.zetex.com
Max
500
Max
65
30
520
-1
2.4
12
20
Units
%/K
Units
mV
mV
mV
mV
mV
µA
k
ppm
nF
mA
mV
µA
/K
V
V
V
V
(a)
)