- 您现在的位置：买卖IC网 > PDF目录1839 > MAX17062ETB+T (Maxim Integrated Products)IC TFT-LCD DC/DC CONV 10-TDFN PDF资料下载
参数资料
| 型号： | MAX17062ETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/14页 |
| 文件大小： | 0K |
| 描述： | IC TFT-LCD DC/DC CONV 10-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 应用： | LCD 显示器 |
| 电流 - 电源： | 1.5mA |
| 电源电压： | 2.6 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 标准包装 |
| 其它名称： | MAX17062ETB+TDKR |
TFT-LCD Step-Up DC-DC Converter
Input Capacitor Selection
The input capacitor (C IN ) reduces the current peaks
drawn from the input supply and reduces noise injection
into the IC. Two 4.7μF ceramic capacitors are used in
the Typical Operating Circuit (Figure 1) because of the
while C COMP is chosen to set the integrator zero to
maintain loop stability. The second capacitor, C COMP2 ,
is chosen to cancel the zero introduced by output-
capacitance ESR. For optimal performance, choose the
components using the following equations:
high source impedance seen in typical lab setups.
Actual applications usually have much lower source
impedance since the step-up regulator often runs
directly from the output of another regulated supply.
Typically, C IN can be reduced below the values used in
the typical operating circuit. Ensure a low-noise supply
at IN by using adequate C IN . Alternatively, greater volt-
age variation can be tolerated on C IN if IN is decoupled
R COMP ≈
C COMP ≈
315 × V IN × V OUT × C OUT
L × I MAIN ( MAX )
V OUT × C OUT
10 × I MAIN ( MAX ) × R COMP
from C IN using an RC lowpass filter (see R1 and C3 in
Figure 1).
Rectifier Diode Selection
C COMP 2 ≈
0 . 0036 × R ESR × L × I MAIN ( MAX )
V IN × V OUT
R 1 = R 2 × ? MAIN ? 1 ?
?? V × I ? I × V ??
The MAX17062’s high switching frequency demands a
high-speed rectifier. Schottky diodes are recommend-
ed for most applications because of their fast recovery
time and low forward voltage. The diode should be
rated to handle the output voltage and the peak switch
current. Make sure that the diode’s peak current rating
is at least I PEAK calculated in the Inductor Selection
section and that its breakdown voltage exceeds the
output voltage.
Output Voltage Selection
The MAX17062 operates with an adjustable output from
V IN to 20V. Connect a resistive voltage-divider from the
output (V MAIN ) to AGND with the center tap connected
to FB (see Figure 1). Select R2 in the 10k Ω to 50k Ω
range. Calculate R1 with the following equation:
? V ?
? V FB ?
where V FB , the step-up regulator’s feedback set point,
is 1.24V (typ). Place R1 and R2 close to the IC.
Loop Compensation
The voltage feedback loop needs proper compensation
to prevent excessive output ripple and poor efficiency
caused by instability. This is done by connecting a
resistor (R COMP ) and capacitor (C COMP ) in series from
COMP to AGND, and another capacitor (C COMP2 ) from
COMP to AGND. R COMP is chosen to set the high-
frequency integrator gain for fast transient response,
For the ceramic output capacitor, where ESR is small,
C COMP2 is optional. The best gauge of correct loop
compensation is by inspecting the transient response
of the MAX17062. Adjust R COMP and C COMP as neces-
sary to obtain optimal transient performance.
Soft-Start Capacitor
The soft-start capacitor should be large enough that it
does not reach final value before the output has
reached regulation. Calculate C SS to be:
C SS > 21 × 10 ? 6 × C OUT ×
? 2 ?
? V OUT ? V IN × V OUT ?
? IN INRUSH OUT OUT ?
where C OUT is the total output capacitance including
any bypass capacitor on the output bus, V OUT is the
maximum output voltage, I INRUSH is the peak inrush
current allowed, I OUT is the maximum output current
during power-up, and V IN is the minimum input voltage.
The load must wait for the soft-start cycle to finish
before drawing a significant amount of load current.
The duration after which the load can begin to draw
maximum load current is:
t MAX = 2.4 x 10 5 x C SS
10
______________________________________________________________________________________
相关PDF资料 |
PDF描述 |
|---|---|
| MAX17067EUA+T | IC REG BOOST ADJ 0.3A 8UMAX |
| MAX1706EEE+T | IC REG BOOST ADJ 0.4A 16QSOP |
| MAX17075ETG+T | IC DC-DC CONV W/CHRG PUMP 24TQFN |
| MAX17080GTL+T | IC CONTROLLER AMD SVI 40-TQFN |
| MAX17083ETG+T | IC REG BUCK ADJ 5A 24TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17062EVKIT | 功能描述:电源管理IC开发工具 MAX17062 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17062EVKIT+ | 功能描述:电源管理IC开发工具 MAX17062 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17065ETI+ | 功能描述:直流/直流开关转换器 TFT-LCD Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX17065ETI+T | 功能描述:直流/直流开关转换器 TFT-LCD Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX17065EVKIT+ | 功能描述:电源管理IC开发工具 MAX17065 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
发布紧急采购，3分钟左右您将得到回复。