ZXSC310EV Diodes Zetex, ZXSC310EV Datasheet - Page 10

• Manufacturer Part Number: ZXSC310EV
• Description: BOARD EVALUATION FOR ZXSC310E5TA
• Manufacturer: Diodes Zetex

Specifications of ZXSC310EV

• Outputs And Type: 1, Non-Isolated
• Features: Programmable output current
• Voltage - Input: 0.8 ~ 8 V
• Utilized Ic / Part: ZXSC310
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Peak current definition
The peak current rating is a design parameter whose
value is dependent upon the overall application. For
the high brightness reference designs, a peak current
of 190mA was chosen to ensure that the converter
could provide the required output power to the LED.
In general, the I
the switching transistor, Q1, is in full saturation with
maximum output power conditions, assuming
worse-case input voltage and transistor gain under all
operating temperature extremes.
ZXSC310
S E M I C O N D U C T O R S
Input Voltage
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
(V)
5V
5V
5V
5V
5V
5V
5V
5V
5V
PK
value must be chosen to ensure that
LED current
(mA)
10
10
10
20
20
20
30
30
30
10
10
10
20
20
20
30
30
30
No. of LED’s
3
4
6
3
4
6
3
4
6
3
4
6
3
4
6
3
4
6
10
Once I
determined by:
A selection guide of sense resistor and inductor values
for given input voltages, output currents and number
of LED connected in series is provided in the table
below.
PK
R
(m )
510
330
150
220
150
170
100
750
510
330
440
250
150
330
170
100
SENSE
77
47
is decided the value of R
R
SENSE
Inductor
( H)
ISSUE 3 - SEPTEMBER 2007
=
68
68
68
68
68
68
68
68
68
68
68
68
68
68
68
68
68
68
V
ISENSE
I
PK
SENSE
Efficiency
(%)
80
81
79
84
93
79
84
84
77
83
84
79
85
85
82
86
85
83
can be