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| 型号： | MAX17085GTL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/38页 |
| 文件大小： | 0K |
| 描述： | IC CHARGER/CTLR/LDO REG 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 功能： | 充电管理 |
| 电池化学： | 多化学 |
| 电源电压： | 4.5 V ~ 24 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 托盘 |
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Integrated Charger, Dual Main Step-Down
Controllers, and Dual LDO Regulators
Table 4. Charger Operating Mode Truth Table
DCIN
X
X
< UVLO
< UVLO
< UVLO
> UVLO
> UVLO
> UVLO
> UVLO
ADAPTER
PRESENT
(NOTE 5)
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
INPUT
CURRENT
V CSSP - V CSSN
X
X
> OCP threshold
X
< OCP threshold
X
> OCP threshold
< OCP threshold
< OCP threshold
ACIN
X
X
X
V ACIN > V ACINOV
V ACINOK < V ACIN
and
V ACIN < V ACINOV
V ACINOK < V ACIN
and
V ACIN < V ACINOV
X
V ACINOK < V ACIN
and
V ACIN < V ACINOV
< ACOV threshold
ISET
< 1V
> 1V
X
X
X
X
X
< ISET
shutdown
threshold
> ISET
shutdown
threshold
PDSL
GND
GND
GND
GND
V DCIN
+ 8V
GND
GND
V DCIN
+ 8V
V DCIN
+ 8V
CHARGER
STATE
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
(ISET control)
IINP
OFF
ON
ON
ON
ON
ON
ON
ON
ON
COMMENTS
—
—
—
—
—
Adapter
overvoltage fault
Adapter
overcurrent fault
ISET shutdown
—
Note 5: Adapter is present when V DCIN - V CSIN > 420mV with V DCIN rising, and absent when V DCIN - V CSIN < 120mV with V DCIN
falling.
When the adapter voltage is removed and the adapter
is absent, the charger is disabled and PDSL is pulled to
GND. N3 and Q1a turn off, and Q1b turns on to supply
power to the system from the battery.
Operating Conditions
Table 4 defines the MAX17085B charger operating conditions.
Charger SMPS
The MAX17085B employs a synchronous step-down
DC-DC converter with an n-channel high-side MOSFET
switch and an n-channel low-side synchronous rectifier.
The charger features a controlled inductor current ripple
architecture, current-mode control scheme with cycle-
by-cycle current limit. The controller’s off-time (t OFF ) is
adjusted to keep the high-side MOSFET junction tem-
perature constant. In this way, the controller switches
faster when the high-side MOSFET has available thermal
capacity. This allows the inductor current ripple and
the output voltage ripple to decrease so that smaller
and cheaper components can be used. The controller
can also operate in discontinuous conduction mode for
improved light-load efficiency.
The operation of the DC-to-DC controller is determined
by the following five comparators as shown in the func-
tional diagram in Figures 2 and 4:
U The IMIN comparator triggers a pulse in discontinu-
ous mode when the accumulated error is too high.
IMIN compares the control signal (LVC) against
5mV (typ) (referred at V CSIP - V CSIN) . When LVC is
less than 5mV, DHC and DLC are both forced low.
Indirectly, IMIN sets the peak inductor current in dis-
continuous mode.
U The CCMP comparator is used for current-mode
regulation in continuous conduction mode. CCMP
compares LVC against the inductor current. The high-
side MOSFET on-time is terminated when the CSI
voltage is higher than LVC.
U The IMAX comparator provides a secondary cycle-
by-cycle current limit. IMAX compares CSI to the
current limit programmed at ISET. The high-side
MOSFET on-time is terminated when the current-
sense signal exceeds the programmed limit. A new
24
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17085GTL+ | 功能描述:电池管理 Dual Main Step-Down Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17086GTL+ | 功能描述:电池管理 Dual Main Step-Down Controller RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| MAX17088ETX+ | 功能描述:显示驱动器和控制器 Boost & Level Shift for Notebook RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX17088ETX+T | 功能描述:显示驱动器和控制器 Boost & Level Shift for Notebook RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX17088EVKIT+ | 功能描述:电源管理IC开发工具 MAX17088 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 |
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