lm2707 National Semiconductor Corporation, lm2707 Datasheet - Page 4

• Manufacturer Part Number: lm2707
• Description: Inductive-boost Series Led Driver With Programmable Oscillator Frequency
• Manufacturer: National Semiconductor Corporation

www.national.com
Open Circuit Protection Section (V
V
I
Input Voltage Section (V
V
I
I
Symbol
OVP
IN, Off
IN, On
OVP
IN, Low
Electrical Characteristics
Unless otherwise specified: V
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of
the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: For detailed soldering specifications and information, please consult the National Semiconductor Application Note titled: "Mounting of Surface Mount
Components".
Note 4: The Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. (MIL-STD-883 3015.7) The machine model is a 200pF
capacitor discharged directly into each pin. (EAIJ)
Note 5: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be
derated. Maximum ambient temperature (T
dissipation of the device in the application (P
following equation: T
Note 6: Junction-to-ambient thermal resistance (θ
test board conforming to JEDEC standards. In applications where high maximum power dissipation exists, special care must be paid to thermal dissipation issues
when designing the board layout.
Note 7: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical (Typ) numbers are not guaranteed, but do represent the most likely norm.
Note 8: I
Note 9: R
Note 10: Do not connect the output circuit directly to GND: R
LIMIT
SC
Output Over-Voltage Protection
(Open Circuit)
V
Undervoltage Lockout (Low
Voltage Stop)
Shutdown Supply Current
Quiescent Supply Current
OVP
: Guaranteed by the design equation: I
: The value of current source I
Pin Input Current
A-MAX
Parameter
= T
IN
J-MAX-OP
pin)
IN
– (θ
= 3.0V, L
JA
A-MAX
L
OVP
D-MAX
(DC measurement) when the switching operation is stopped by the I
x P
pin)
) is dependent on the maximum operating junction temperature (T
JA
D-MAX
), and the junction-to ambient thermal resistance of the part/package in the application (θ
LIMIT
) is highly application and board-layout dependent. The 125
x
(Notes 2, 7) (Continued)
= Open, V
).
= { 0.1V - [(2.3V x V
Protection Activation Threshold
Protection Deactivation Threshold
Hysteresis
V
V
Lockout Deactivation Threshold
Lockout Activation Threshold
Hysteresis
V
V
OVP
OVP
EN
FB
SC
= 1.0V
= 0.3V
might be damaged. (Excessive current will pass through R
= 18.5V, V
= 18.5V, V
OVP
= Open, V
IN
EN
EN
) / 300] } / R
4
Condition
= 3V
= 0V
FB
= GND, C
SC
x
= 300pF, V
o
C/W figure provided was measured on a 4-layer
S
comparator.
EN
JMAX-OP
17.5
17.0
Min
1.8
1.7
0.2
SC
= V
, the Schottky Diode, and the coil.)
IN
= 125
, T
18.75
18.25
0.03
0.01
Typ
0.5
2.0
1.9
0.1
0.5
50
A
o
C), the maximum power
= 25˚C.
JA
), as given by the
Max
20.0
19.5
100
2.3
2.2
0.8
1
Units
mA
µA
µA
µA
V
V
V
V
V
V