ZXLD1350ET5 Diodes Inc, ZXLD1350ET5 Datasheet - Page 12

• Manufacturer Part Number: ZXLD1350ET5
• Description: IC, LED DRIVER, BUCK, TSOT-23-5
• Manufacturer: Diodes Inc

Specifications of ZXLD1350ET5

• Led Driver Application: Automotive Lighting, Illuminated Signs
• No. Of Outputs: 1
• Output Current: 350mA
• Output Voltage: 30V
• Input Voltage: 7V To 30V
• Dimming Control Type: PWM / DC
• Topology: Buck
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ZXLD1350
Document number: DS33468 Rev. 8 - 2
Application Information
Setting nominal average output current with external resistor R
The nominal average output current in the LED(s) is determined by the value of the external current sense resistor (R
connected between V
I
The table below gives values of nominal average output current for several preferred values of current setting resistor (R
the typical application circuit shown on page 1:
The above values assume that the ADJ pin is floating and at a nominal voltage of V
minimum allowed value of sense resistor under these conditions to maintain switch current below the specified maximum
value.
It is possible to use different values of R
Output current adjustment by external DC control voltage
The ADJ pin can be driven by an external dc voltage (V
the nominal average value defined by R
The nominal average output current in this case is given by:
I
Note that 100% brightness setting corresponds to V
increased in proportion to prevent I
The input impedance of the ADJ pin is 200kΩ ±25%.
OUTnom
OUTdc
DC
R
GND
0.27
0.30
0.33
0.39
+
S
= 0.08*V
(Ω)
= 0.1/R
ADJ
S
Nominal average output
[for R
ADJ
/R
IN
S
current (mA)
and I
S
for 0.3 < V
> 0.27Ω]
370
333
300
256
SENSE
ZXLD1350
OUTdc
and is given by:
GND
ADJ
S
S
.
exceeding 370mA maximum.
if the ADJ pin is driven from an external voltage. (See next section).
< 2.5V
www.diodes.com
ADJ
ADJ
12 of 22
), as shown, to adjust the output current to a value above or below
= V
REF
. When driving the ADJ pin above 1.25V, R
30V 350mA LED DRIVER with AEC-Q100
S
Diodes Incorporated
REF
A Product Line of
(=1.25V). Note that R
S
© Diodes Incorporated
ZXLD1350
= 0.27V is the
S
March 2011
must be
S
) in
S
)