- 您现在的位置：买卖IC网 > PDF目录1826 > LT8582IDKD#TRPBF (Linear Technology)IC REG MULTI CONFIG ADJ 3A 24DFN PDF资料下载
参数资料
| 型号： | LT8582IDKD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/36页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 3A 24DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 最高 42V |
| 输入电压： | 2.5 V ~ 22 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.5MHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 24-DFN（7x4） |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页
LT8582
APPLICATIONS INFORMATION
SEPIC Converter Component Selection – Coupled or
Uncoupled Inductors
Table 2. SEPIC Design Equations
PARAMETERS/EQUATIONS
V OUT + 0.5V
V IN + V OUT + 0.5V – 0.3V
V IN
3V TO
19V
L1
6.8μH
C1
2.2μF
D1
40V, 2A
L2
V OUT
5V
1A(V IN >12V)
Step 1: Inputs
Step 2: DC
Choose V IN , V OUT and f OSC to calculate equations
below.
DC ?
6.8μH
SWA SWB
V IN LT8582 FBX
CHx
SHDN GATE
R FBX
45.3k
C OUT
22μF
Step 3: L
L TYP =
(V IN – 0.3V) ? DC
f OSC ? 1A
(1)
100k
PG
RT
CLKOUT
V C
×2
L MIN =
(V IN – 0.3V) ? (2 ? DC – 1)
1.7A ? f OSC ? (1 – DC)
(2)
C IN
10μF
R T
107K
SYNC GND SS
0.1μF
47pF
14.7k
1.5nF
L MAX =
(V IN – 0.3V) ? DC
f OSC ? 0.18A
(3)
8582 F06
?
Solve equations 1, 2 and 3 for a range of L
values
Figure 6. SEPIC Converter – The Component Values Given
Are Typical Values for a 700kHz, 3V - 19V to 5V SEPIC
Topology Using Coupled Inductors
?
?
The minimum of the L value range is the
higher of L TYP and L MIN
The maximum of the L value range is L MAX
I RIPPLE =
Each channel of the LT8582 can also be configured as a
SEPIC as shown in Figure 6. This topology allows for posi-
tive output voltages that are lower, equal, or higher than
the input voltage. Output disconnect is inherently built into
Step 4: I RIPPLE
? L = L1 = L2 for coupled inductors.
? L = L1||L2 for uncoupled inductors.
(V IN – 0.3V) ? DC
f OSC ? L
I OUT = ? 3A –
? ? ? (1 – DC)
the SEPIC topology, meaning no DC path exists between
the input and output due to capacitor C1. Therefore the
Step 5: I OUT
?
?
I RIPPLE ?
2
external PMOS is not required.
Table 2 is a step-by-step set of equations to calculate
Step 6: D1
Step 7: C1
V R ≥ V IN + V OUT ; I AVG ≥ I OUT
C1 ≥ 1μF; V RATING ≥ V IN
component values for the LT8582 when operating as a
SEPIC converter. Input parameters are input and output
Step 8: C OUT
C OUT ≥
I OUT ?DC
f OSC ? 0.005 ? V OUT
voltage and switching frequency (V IN , V OUT and f OSC
respectively). Refer to the Appendix for further information
on the design equations presented in Table 2.
Step 9: C IN
C IN ≥ C VIN + C PWR ≥
3A ? DC
50 ? f O sc ? 0.005 ? V IN
+
I RIPPLE
8 ? f O sc ? 0.005 ? V IN
R FBX = ? OUT
Variable Definitions:
V IN = Input Voltage
V OUT = Output Voltage
Step 10: R FBX
? V – 1.204V ?
?
? 83.3μA ?
DC = Power Switch Duty Cycle
f OSC = Switching Frequency
Step 11: R T
R T =
81.6
f OSC
–1; f OSC in MHz, R T in k Ω
I OUT = Maximum Output Current
I RIPPLE = Inductor Ripple Current
Note 1: Above equations use numbers good for many applications but
for more exact results use the equations from the appendix with numbers
from the Electrical Characteristics.
Note 2: The final values for C OUT , and C IN may deviate from the above
equations in order to obtain desired load transient performance.
8582f
14
相关PDF资料 |
PDF描述 |
|---|---|
| LTC1043CSW#TRPBF | IC BUILDNG BLK SW-CAP DUAL18SOIC |
| LTC1044CS8#TRPBF | IC REG MULTI CONFIG 20MA 8SOIC |
| LTC1046IS8#TRPBF | IC REG SWITCHD CAP DIV INV 8SOIC |
| LTC1142LCG-ADJ#TRPBF | IC REG CTRLR BUCK PWM CM 28-SSOP |
| LTC1143LCS#PBF | IC REG CTRLR BUCK PWM CM 16-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT8584IFE#PBF | 制造商:Linear Technology 功能描述:IC BATT CELL BALANCE 16TSSOP 制造商:Linear Technology 功能描述:BATTERY BALANCER, 2.5V-5.3V, TSSOP-16, Supply Voltage Min:2.5V, Supply Voltage M |
| LT8610 | 制造商:LINER 制造商全称:Linear Technology 功能描述:42V, 2.5A Synchronous Step-Down Regulator |
| LT8610ABEMSE#PBF | 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16, Primary Input Voltage:42V, No. of Outp |
| LT8610AEMSE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 2.5A 16MSOP 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16, Primary Input Voltage:42V, No. of Outp |
| LT8610AHMSE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SYNC ADJ 2.5A 16MSOP 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16 制造商:Linear Technology 功能描述:SWITCHING REG, BUCK, ADJ, 2.2MHZ, MSOP16, Primary Input Voltage:42V, No. of Outp |
发布紧急采购，3分钟左右您将得到回复。