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PDF T8302 Data sheet ( Hoja de datos )
| Número de pieza | T8302 | |
| Descripción | PWM Control 1A Step-Down Converter | |
| Fabricantes | TM Technology | |
| Logotipo |  |
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tm TE
CH
T8302
PWM Control
1A Step-Down Converter
Data Sheet
TM Technology Inc.
1 page  
tm TE
CH
T8302
Electrical Characteristics (continuous)
Duty cycle range of PWM signal
applied to ADJ pin during low
DPWML frequency PWM dimming mode
Brightness control range
PWM frequency<300Hz
PWM amplitude = VREF
Measured on ADJ pin
0.001
1
1000:1
Duty cycle range of PWM signal
applied to ADJ pin during high
DPWMH frequency PWM dimming mode
Brightness control range
PWM frequency>10KHz
PWM amplitude = VREF
Measured on ADJ pin
0.16 1
5:1
fLX Operating frequency
ADJ pin floating, L = 33uH (0.093 ohm)
IOUT=1A @VLED = 3.6V Driving 1 LED
280 KHz
TONmin Minimum switch ‘ON’ time
LX switch ‘ON’
100**
ns
TOFFmin Minimum switch ‘OFF’ time
LX switch ‘OFF’
60**
ns
TONminR
Recommended minimum switch 'ON'
time
LX switch ‘ON’
800 ns
fLXmax
Recommended maximum operating
frequency
1 MHz
DLX
Recommended duty cycle range of
output switch at fLXmax
0.3 0.7
TPD Internal comparator propagation delay
50 ns
Notes :
*100% brightness corresponds to VADJ = VADJ(nom) = VREF. Driving the ADJ pin above VREF will increase
the VSENSE. threshold and output current proportionally.
**Parameters are not tested at production. Parameters are guaranteed by design, characterization and
process control.
Block Diagram
V CC
V IN
RS D1 LED L1
LX
C1
4 .7 u F
ADJ
EN
GND
V ref.
B uffer
R1
R4
V o ltag e
reg u lato r
B and
gap
-
+
In tern al
VDD
R2
O ver
Tem p.
R3
-
+
MN
D riv er
TM Technology, Inc. reserves the right
P. 4
to change products or specifications without notice.
Publication Date:April 2014
Revision: E
5 Page 
tm TE
CH
PACKAGE DIMENSIONS
SOT-89
D
POLISHED(2X)
EH
B1 1
10'(2X)
2 3L
B
e
e1
A
C
Symbol
A
B
B1
C
D
E
H
e
e1
L
Dimension in mm
Min. Max.
1.40 1.60
0.44 0.56
0.36 0.48
0.35 0.44
4.40 4.60
2.29 2.60
3.94 4.25
1.50 BSC
3.00 BSC
0.89 1.2
Dimension in inch
Min.
Max.
0.055
0.063
0.017
0.022
0.014
0.019
0.013
0.017
0.173
0.181
0.090
0.102
0.155
0.167
0.059 BSC
0.118 BSC
0.035
0.047
T8302
TM Technology, Inc. reserves the right
P. 10
to change products or specifications without notice.
Publication Date:April 2014
Revision: E
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet T8302.PDF ] | |
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