LV5066V Просмотр технического описания (PDF) - SANYO -> Panasonic
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LV5066V Datasheet PDF : 5 Pages
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Pin Assignment
LV5066V
PG 1
EN 2
ILIM 3
VIN 4
RSNS 5
HDRV 6
PDR 7
GND 8
TOP VIEW
LV5066V
16 REF
15 FB
14 COMP
13 N.C.
12 SS
11 C-HICCUP
10 RT
9 SYNC
Pin Descriptions
Pin
Pin name
No.
1 PG
2 EN
3 ILIM
4 VIN
5 RSNS
6 HDRV
Descriptions
Power good pin.
Connect to open drain of MOS-FET in ICs inside.
Setting output voltage to "L", when FB voltage is 1.05V or less
ON/OFF pin
For current detection.
Sink current is about 55μA. The current limiter comparator works when an external resistor is connected between this pin and
VIN, and if the voltage of this resistor is less than the voltage of RSNS then Pch MOS is turned off. This operation is reset each
PWM pulse.
Supply voltage pin
It is observed by the UVLO function. When its voltage becomes 3.4V or more, ICs startup in soft start.
Current detection resistor connection pin.
Resistor is connected between VIN and this pin, and the current flows to MOSFET are measured.
The external high-side MOSFET gate drive pin
7 PDR
8 GND
9 SYNC
Gate drive voltage of the external Pch MOSFET.
Meanwhile, the bypass capacitor is connected between VIN and this pin.
Ground Pin
Ground pin voltage is reference voltage.
Pin of using combined of external synchronous signal input pin
10 RT
11 C-HICCUP
12 SS
13 NC
Oscillation frequency setting pin.
Resistor is connected between this pin and GND.
It is capacitor connection pin for setting re-startup cycle in HICCUP mode
If connect it to GND pin, then latch-off when over current.
Capacitor connection pin for soft start.
About 2μA current charges the soft start capacitor.
NC pin.
14 COMP
15 FB
16 REF
Error Amplifier Output Pin
The phase compensation network is connected between GND pin and COMP pin
Thanks to current-mode control, COMP pin voltage would tell you the output current amplitude. COMP pin is connected
internally to an int.comparator which comparators with 0.9V reference. If COMP pin voltage is larger than.
0.9V, IC operates in “continuous mode”. If COMP pin voltage is smaller than 0.9V, IC operates in “discontinuous mode (low
consumption mode)”.
Error amplifier reverse input pin
ICs make its voltage keep 1.26V. Output voltage is divided by external resistors and it across FB.
Reference voltage.
No.A2012-4/5
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