GENERAL DEscriptION
The SGM41283 is a current-mode boost converter with a wide input voltage range of 2.7V to 5.5V. The device can deliver up to 70V output. The 850kHz fixed switching frequency allows the SGM41283 to offer fast transient response and cycle-by-cycle current limit.
This device integrates the biased avalanche photodiode (APD) current monitor and is capable to provide 50ns APD current monitoring response speed. In addition, the output voltage through the APD optical receivers can be twice of the normal output voltage. The SGM41283 includes a ratio of 10:1 APD current monitoring output and a ratio of 2:1 APD current monitoring output. The current limit function with adjustable resistors prevents APD from the effects of optical power transients.
The SGM41283 integrates various protection features such as over-current protection, over-load protection and thermal shutdown.
The SGM41283 is available in a Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40℃ to +125℃.
FEATURES
Input Voltage Range: 2.7V to 5.5V
72V/0.6Ω NFET with 1.1A Limit
70V Peak Output Voltage
50ns APD Current Monitoring Response Speed
850kHz Fixed Switching Frequency
High-side APD Current Monitors with 10:1 and 2:1 Ratios
Internal Compensation and Soft-Start
Thermal Shutdown
Programmable APD Over-Current Limit and Protection
-40℃ to +125℃ Operating Temperature Range
Available in a Green TQFN-3×3-16L Package
APPLICATIONS
APD and PIN Diode Bias
Optical Network Equipment
Optical Receivers and Modules