NCP1910GEVB ON Semiconductor, NCP1910GEVB Datasheet - Page 5

• 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

OVP2
Vfold
LBO
VCTRL
DRV
CS
VM
FB
VLBO
RFB
pull down
ICS
Vfold(max)
VDD
ILBO
VLBOT
VLD
Vpref
107% Vpref
105% Vpref
VUVP
VOVP2
VOVP
8% Vpref
Multiplier
95% Vpref
A
B
ICS
+
−
PFC_OPL
PFC_OK
VLBO^2
ICS
BO delay
+
+
+
−
−
−
−
−
−
+
+
+
“1” BO NOTOK,
“0” BOK
ICS x VLBO^2
“1” = FB > Vpref
ICS x VLBO > 275 uA
Latched adjustable OVP2
VLBO^2
ICS > 200 uA
Auto−recovery internal OVP
“1” OVP, “0” = ok
“1” = UVP, “0” ok
“1” OVP2, “0” = ok
PFC_BO
OTA
+
−
+
−
“1” = below 5% reg
“0” ok
Vctrl
Dynamic
Response
Enhancer
Figure 4. Internal PFC Block Diagram
Vctrl−Vctrl(min)
Vctrl(min)
PFC_SKIP
PFC_OVP
“1” = OPL
IVLD
B
A
PFC_OL
PFC_BO
“1” = OCP
A/B
Grand Reset
4 ( Vctrl * Vctrl ( min ))
PFC_BO
Latch
UVLO
Vpref
Onoff
TSD
VDD
Closed
PFC_UVP
PFC_OVP
if “1”
ICS
PFC_OCP
PFC_OPL
http://onsemi.com
Ict(fold)
PFC_OK
VLBO 2
20 us filter
PFC_OL
R
S
PFC_SKIP
(0.6 V clamp
voltage is
activated.)
Q
Q
Vctrl(min) − 0.1 V
−
+
5
“1” open
“0” close
ICt(min)
Grand Reset
PFC_BO
Vctrl
Vctrl(max)
S
R
Vcc
Vdd
Q
Q
PFC_OVP2
latched
Oscillator section
−
−
+
+
ICt
PFC_BO
PFCflag
Grand
Reset
“0” / “1”
Vpref / 10%Vpref
If PFC issues an abnormal
situation, then latch off
PFC drive signal
Grand Reset
PFC_BO
1 sec
delay
+
−
The “PFC_OK” toggles high when:
− VLD is low
− PFC issues a driving pulse
The “PFC_OK” toggles low when:
− Vctrl stays out of window [Vctrl,min to
Vctrl,max] > 1 sec
− at this point, the latch is reset and the
“PFC_OK” output goes low.
R
S
R
S
Q
Q
Q
Q
PFC_abnormal
latched
PFC_BO
Latch
Grand Reset
PFC_OK