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LM3502SQ-16 датащи(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали LM3502SQ-16
подробное описание детали  Step-Up Converter for White LED Applications
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3502SQ-16 датащи(HTML) 5 Page - National Semiconductor (TI)

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Preliminary Electrical Characteristics (Notes 6, 7) Limits in standard typeface are for T
J = 25˚C.
Limits in bold typeface apply over the full operating junction temperature range (−40˚C
≤ T
J
≤ +125˚C). Unless otherwise
specified, V
IN = 2.5V. (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
VOUT1(ON)
V
OUT1 Pin Bias
Current (Note 3)
V
OUT1 = 14V, Cntrl = 1.5V (16)
V
OUT1 = 23V, Cntrl = 1.5V (25)
V
OUT1 = 32V, Cntrl = 1.5V (35)
V
OUT1 = 42V, Cntrl = 1.5V (44)
40
50
50
85
80
100
100
140
µA
I
VOUT2
V
OUT2 Pin Leakage
Current (Note 3)
Fb = 0V, Cntrl = 0V, V
OUT2 = 42V
0.1
3
µA
UVP
Under-Voltage
Protection
On Threshold
Off Threshold
2.2
2.4
2.3
2.5
V
OVP
Over-Voltage
Protection (Note 5)
On Threshold (16)
Off Threshold (16)
On Threshold (25)
Off Threshold (25)
On Threshold (35)
Off Threshold (35)
On Threshold (44)
Off Threshold (44)
14.5
14.0
22.5
21.5
32.0
31.0
40.5
39.0
15.5
15
24
23
34
33
42
41
16.5
16.0
25.5
24.5
35.0
34.0
43.5
42.0
V
V
En1
PMOS FET Switch
Enabling Threshold
(Figure 2: P1)
Off Threshold (Display Lighting)
On Threshold (Display Lighting)
1.4
0.8
0.8
0.3
V
V
En2
NMOS FET Switch
Enabling Threshold
(Figure 2: N2)
Off Threshold (Display Lighting)
On Threshold (Display Lighting)
1.4
0.8
0.8
0.3
V
V
Cntrl
Device Enabling
Threshold
Off Threshold
OnThreshold
1.4
0.8
0.8
0.3
V
T
SHDW
Shutdown Delay Time
8
12
16
ms
I
En1
En1 Pin Input Bias
Current
En1 = 2.5V
En1=0V
7
0.1
14
µA
I
En2
En2 Pin Input Bias
Current
En2 = 2.5V
En2=0V
7
0.1
14
µA
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical characteristic specifications do not apply when
operating the device outside of its rated operating conditions.
Note 2: The human body model is a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin. The machine model is a 200 pF capacitor discharged
directly into each pin.
Note 3: Current flows into the pin.
Note 4: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA,
and the ambient temperature, TA. See Thermal Properties for the thermal resistance. The maximum allowable power dissipation at any ambient temperature is
calculated using: PD(MAX) = (TJ(MAX) – TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature. For more information
on this topic, please refer to Application Note 1187: Leadless Leadframe Package (LLP) and Application Note 1112 (AN1112) for microSMD chip scale package.
Note 5: The on threshold indicates that the LM3502 is no longer switching or regulating LED current, while the off threshold indicates normal operation.
Note 6: All voltages are with respect to the potential at the GND pin.
Note 7: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.
Note 8: Current flows out of the pin.
www.national.com
5


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