0
ACTIVE
Rating |
Catalog |
Topology |
Boost, Flyback, Forward, SEPIC |
Vin (max) (V) |
40 |
Vin (min) (V) |
3.1 |
Vout (max) (V) |
75 |
Vout (min) (V) |
1.259 |
Switch current limit (typ) (A) |
2 |
Features |
Enable, Nonsynchronous rectification |
Operating temperature range (°C) |
-40 to 125 |
Iq (typ) (A) |
0.0021 |
Duty cycle (max) (%) |
90 |
TSSOP (PW)-16-32 mm² 5 x 6.4
The LM5000 is a monolithic integrated circuit specifically designed and optimized for flyback, boost or forward power converter applications. The internal power switch is rated for a maximum of 80V, with a current limit set to 2A. Protecting the power switch are current limit and thermal shutdown circuits. The current mode control scheme provides excellent rejection of line transients and cycle-by-cycle current limiting. An external compensation pin and the built-in slope compensation allow the user to optimize the frequency compensation. Other distinctive features include softstart to reduce stresses during start-up and an external shutdown pin for remote ON/OFF control. There are two operating frequency ranges available. The LM5000-3 is pin selectable for either 300kHz (FS Grounded) or 700kHz (FS Open). The LM5000-6 is pin selectable for either 600kHz (FS Grounded) or 1.3MHz (FS Open). The device is available in a low profile 16-lead TSSOP package or a thermally enhanced 16-lead LLP package.
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