XRP7604 Datasheet, PDF (2/13 Pages) Exar Corporation – 1A 29V Non-Sync. Buck High Power LED Driver

XRP7604
1A 29V Non-Sync. Buck High Power LED Driver
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
Input Voltage ............................................. -0.3V to 30V
Lx................................................................-2V to 30V
FB .....................................................-0.3V to V_IN+0.3V
Storage Temperature .............................. -65°C to 150°C
Power Dissipation (Note 1) ................... Internally Limited
Lead Temperature (Soldering, 10 sec) ................... 300°C
ESD Rating (Lx, ISET) ....................................1KV - HBM
ESD Rating (All other pins) .............................2KV - HBM
OPERATING RATINGS
Input Voltage Range V_IN................................4.5V to 29V
Junction Temperature Range ....................-40°C to 125°C
Thermal Resistance θ_JA ...................................... 59°C/W
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T_J = 25°C only; limits applying over the full
Operating Junction Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T_J = 25°C, and are provided for
reference purposes only. Unless otherwise indicated, V_IN = 4.5V to 29V, C_IN = 1µF, T_J = –40°C to 125°C.
Parameter
UVLO Turn-On Threshold
UVLO Turn-Off Threshold
UVLO Hysteresis
Operating Input Voltage Range
Operating Input Voltage Range
Operating VCC Current
Standby VCC Current
Reference Voltage
Reference Voltage
Switching Frequency
Minimum On-Pulse Duration
Minimum Duty Cycle
Maximum Duty Cycle
VDR Voltage
Over-Current Threshold
ISET Pin Input Current
OFF Interval During Hiccup
SHDN Threshold
SHDN Threshold Hysteresis
Switch On Resistance
Switch Leakage
Min.
4.0
3.8
4.5
7
186
960
100
4.5
250
25
0.8
Typ.
4.2
4.0
0.2
2
0.6
200
200
1250
40
300
33
100
1.0
100
95
3
Max.
4.5
4.3
29
29
5
1
214
1550
100
0
5.5
350
40
1.2
5
Units
V
V
V
V
V
mA
mA
mV
mV
kHz
ns
%
%
V
mV
µA
ms
V
mV
mΩ
µA
Conditions
0°C ≤ T_J ≤ 125°C
0°C ≤ T_J ≤ 125°C
0°C ≤ T_J ≤ 125°C
•
V_FB=0.1V, not switching
V_FB=1.2V, not switching
•
•
• ^{Measure VIN-VDR}
V_IN > 7V
Measure V_IN-Lx
• V_IN=V_Lx
• Apply voltage to FB
Note 1: All parameters tested at T_A=25°C. Specifications over temperature are guaranteed by design.
© 2009 Exar Corporation
2/13
Rev. 1.0.0