NCP1910GEVB ON Semiconductor, NCP1910GEVB Datasheet - Page 32

• Manufacturer Part Number: NCP1910GEVB
• Description: BOARD EVAL NCP1910DEMO-B-TLS
• Manufacturer: ON Semiconductor
• Series: -r

Specifications of NCP1910GEVB

• Design Resources: NCP1910 Schematic NCP1910GEVB BOM
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Power - Output: -
• Voltage - Output: Adj down to 0.8V
• Current - Output: 3A
• Voltage - Input: 3 ~ 5.5 V
• Regulator Topology: Buck
• Frequency - Switching: 1MHz
• Board Type: Fully Populated
• Utilized Ic / Part: NCP1910
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NCP1910GEVBOS

LLC Fast Fault Input (CS/FF Pin)
input (CS/FF pin) to detect the primary over−current
conditions and protect the power stage from damage.
of V
closed to discharge C
(150 mV typically). Hence the switching frequency of LLC
PGI for
supervisory
As shown in Figure 59, the NCP1910 offers a dedicated
Once the voltage on the CS/FF pin exceeds the threshold
CS1
(1 V typically), the internal switch at SS pin will be
R
1
V
SB
R
R
V
3
2
CC
SS
until V
PGadj
BOadj
PGout
V
PFC_FB
REF
Figure 58. The PG and BO Block Diagram for LLC
SS
is below V
+
”1” PGNOTOK
−
−
+
LLC_PG
SS_RST
http://onsemi.com
”1” BONOTOK
32
(ML and MU) is shifted up to keep the primary current under
acceptable level.
the primary current grows very fast and thus could reach
danger level. The NCP1910 therefore features additional
comparator V
permanently latch the device (both PFC and LLC) and
protect against destruction.
In case of heavy overload, like transformer short circuit,
Grand
Reset
PFC_OK
”1” is ok
”0” notok
CS2
(1.5 V typically) at the CS/FF pin to
LLC_BO
t
t
BOK
BONOTOK
R
R
”1” after reset
”0” when PG out
drops after 5 ms
”1” enables LLC
”0” LLC is locked
20 ms
t
t
5 ms
DEL1
DEL2
LLC_BO
LLCenable
To close switch
SS is reset
at SS pin