SI-8205NHD_11 [SANKEN]
Surface-Mount, Current Mode Control, Synchronous Rectifier Step-down Switching Mode Regulator ICs; 表面贴装，电流模式控制，同步整流降压开关模式稳压器集成电路
| 型号： | SI-8205NHD_11 |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | Surface-Mount, Current Mode Control, Synchronous Rectifier Step-down Switching Mode Regulator ICs |
| 文件： | 总2页 (文件大小：77K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
1-1-3 DC/DC Converter ICs
SI-8205NHD
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t,
■Features
■Absolute Maximum Ratings
Parameter
Symbol
VIN
PD
Ratings
46
Unit
V
Conditions
• Compact surface-mount (HSOP8) package
Input Voltage (VIN Pin)
Power Dissipation
• Wide input voltage range (VIN): Vo + 3 to 43 V
• Synchronous rectifier mode
1.35
W
When mounted on a 30 × 30 mm glass-epoxy board (with a 25 × 25 mm copper area)
When mounted on a 30 × 30 mm glass-epoxy board (with a 25 × 25 mm copper area)
Junction Temperature
Tj
–40 to +150
°C
°C
• Output current: 3 A
Storage Temperature
Tstg
θj-c
–40 to +150
Thermal Resistance (Junction to Lead <1 pin>)
Thermal Resistance (Junction to Ambient Air)
40
74
°C/W
°C/W
• Reference voltage and accuracy of 0.5 V ±1%
• Oscillation frequency: 200 kHz to 1 MHz
• A ceramic capacitor can be used for output
• Output can be disabled
θj-a
■Recommended Operating Conditions
Parameter
Symbol
Ratings
Unit
V
• Undervoltage Lock Out
Input Voltage Range
VIN
8 or Vo+3 to 43
0 to 3.0
• Soft start function
Output Current Range
Io
A
Output Voltage Range
Vo
0.5 to 24
V
■Applications
Operating Junction Temperature Range
Operating Temperature Range
Tjop
Top
–40 to +125
–40 to +85
°C
°C
• Power supply for LCD module
• Power supply for notebook PC
• Onboard local power supplies
• Power supply for LBP/PPC
*: The minimum value of the input voltage range is 8 V or Vo + 3V, whichever is higher.
■Electrical Characteristics
(Ta = 25°C and fo = 500kHz, unless otherwise specified)
Ratings
typ.
0.500
±0.05
90
Parameter
Symbol
Unit
Conditions
min.
max.
Reference Voltage
Vref
∆VREF/∆T
η
0.495
0.505
V
mV/°C
%
VIN=12V, Io=1.0A
Temperature Coefficient of Reference Voltage
Efficiency
VIN=12V, Io=1.0A, Ta=–40 to +85°C
VIN=12V, Vo=5V, Io=1.0A
VIN=12V, Vo=5V, Io=1A, Rfset=375kΩ
VIN=12V, Vo=5V, Io=1A, Rfset=75kΩ
VIN=8 to 43V, Vo to 5V, Io=1A
VIN=12V, Vo=5V, Io=0.1 to 3.0A
VIN=12V, Vo=5V
Oscillation Frequency 1
Oscillation Frequency 2
Line Regulation
fo1
200
1
kHz
MHz
mV
mV
A
fo2
∆VoLINE
∆VoLOAD
Is
50
Load Regulation
50
Overcurrent Protection Starting Current
3.1
6.0
40
IIN
8
mA
µA
VIN=12V, Vcomp=0V
Quiescent Circuit Current
IIN(OFF)
IEN/SS
VSSH
VC/EH
Vovp
VIN=12V, VEN/ss=0V
Outflow Current at Low Voltage
5
µA
VEN/SS=0V, VIN=12V
EN/SS Pin
Open Voltage
3.0
0.6
4.5
6.0
2.0
V
VIN=12V
On Threshold Voltage
1.3
V
VIN=12V
OVP Start Voltage
0.57
151
0.60
160
800
800
3.33
90
0.63
V
Thermal Protection Start Temperature
Error Amplifier Voltage Gain
Error Amplifier Transformer Conductance
Current Sense Amplifier Impedance
Maximum ON Duty
Tj
°C
AEA
GEA
GCS
DMAX
DMIN
V/V
µA/V
A/V
%
80
VIN=12V
VIN=12V
Minimum ON Time
150
nsec
ICs
50
SI-8205NHD
■External Dimensions (HSOP8)
(Unit : mm)
Pin Assignment
Pin 1 Mark
q
w
e
r
t
y
u
i
GND
EN/SS
V
IN
FSET
COMP
FB
BS
SW
Enlarged View of A
0.695 TYP
5.20
A
0.4
1.27
0.40
Plastic Mold Package Type
Flammability
Product Mass
: UL 94V-0
: Approx. 0.1 g
2.90
■Block Diagram
③VIN
⑦BS
+
CUR_SUS
REG
–
REG
REG_DRV
REG
DRV_REG
REG_DEV
REG_DEV
REG
REG_BIAS STANDBY
STANDBY
OVC
H/S
Drv
BC
OCP_CMP
RegOK
M1
REG_UVLO
VinOK
VIN_UVLO
Level
Shift
PWR_stage
M2
L/S
Drv
⑧SW
REG
REG
VinOK
REG
VinOK
Level
Shift
Phase
LSoft
GATE_logic
Set PH
Phase_
logic
Fere Off
Ramp
OSC_RAMP
REG
STANDBY
FB
REG
FSET④
Res PH
REG
CUR_COMP
VinOK
OVT
BS_CHG
PH Open
REG
Fere_Off
Set PH
OVT
Control_logic
BG
TSD
REG
RegOK
VinOK
INIT OVP
OVP
OVP_CMP
REG_BIAS
REG
SS_Ref
⑥FB
REG
BG
Ref
Rnf
SS_Rnf
EN_SS
Err_AMP
STANDBY
REF
①GND
⑤COMP
■Typical Connection Diagram
C1:10µF/50V×2
ꢀ(murata:GRM55DB31H106KA87)
C2:22µF/16V×2
ꢀ(murata:GRM32ER71A226KE20)
C3:270pF
VIN
R5
C4
3
7
BS
L1
V
O
8
VIN
EN/SS
2
SW
ꢀ(murata:GRM18 type)
C4:10µF
C1
SI-8205NHD
C2
4
6
ꢀ(murata: GRM18 type)
C5:1µF
FSET
GND
1
FB
COMP
GND
R1
R2
5
C3
C5
R4
ꢀ(murata: GRM18 type)
L1:10µH
GND
C6
Open
D1: SJPB-L6 (Sanken)
R1:9kΩ(When Vo=5V)
R2:1kΩ
R3
D1
R3:51kΩ
R4:150kΩ
R5:47Ω
ICs
51
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