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PDF MAX77829 Data sheet ( Hoja de datos )
| Número de pieza | MAX77829 | |
| Descripción | Companion PMIC | |
| Fabricantes | Maxim Integrated | |
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Hay una vista previa y un enlace de descarga de MAX77829 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MAX77829
EVALUATION KIT AVAILABLE
Companion PMIC for Smartphone and Tablet
General Description
The MAX77829 is a high-performance companion PMIC
for latest 3G/4G smartphones and tablets. The PMIC
includes a single-input 2.0A switched-mode charger with
reverse-boost capability and adapter input protection
up to 22V (DC) for one-cell Lithium-Ion (Li+) battery, a
safeout LDO, and WLED backlight driver supporting up to
25mA/string, 35V output voltage. It also features a dual-
channel 1.5A (combined, 750mA/CH) Flash LED driver
(with Torch Mode included).
The typical 4MHz switched-mode battery charger with
two integrated switches, providing the smallest L/C size,
lowest heat and fastest programmable battery-charging
current, is ideally suited for portable devices such as
headsets and ultra-portable media players. The char-
ger features single input, which works for adapter/USB
type inputs. All the MAX77829 blocks connecting to the
adapter/USB pin are protected from input overvoltage
events. The DC pin is rated to 22V absolute maximum.
The USB-OTG output provides true-load disconnect and
is protected by an adjustable output current limit (default
900mA, other current limit is also available with different
factory setting up to 900mA).
The battery charger drives an external p-channel MOSFET
as power-path switch, and its I2C-programmable settings
can accommodate a wide range of battery sizes and
system loads. When configured in reverse boost mode,
the MAX77829 requires no additional inductor to power
USB OTG accessories and/or provide illumination to the
Flash LED.
The switching charger implements a special CC, CV,
and die temperature regulation algorithm; the patented
MaxFlash prevents overloading a weak battery, further
extending battery life.
The MAX77829 features an I2C 2.0-compatible serial
interface consisting of a bidirectional serial data line
(SDA) and a serial clock line (SCL).
Benefits and Features
●● Highly Integrated Solution
• Single Input Switched Mode Charger
• Camera Flash and Torch LED Driver, Dual-Channel
750mA/ch
• Two-String White LED Backlight Driver, 25mA/ch,
35V OVP
• One Safeout LDO
●● Single High Efficient Switched Mode Charger
• Supporting Up to 2.0A Charging Current Capability
• Input-Voltage-Based Automatic Input Current Limit
(AICL) Power Management
• System Voltage Regulator/Battery Charger with
External Power Path
• Various Charging Protection Features
●● Single Input Accommodating Standard USB and High
Input Voltage Adaptor
• 22V Absolute Maximum Input Voltage Rating,
• up to +9.4V Maximum Operating Input Voltage
●● USB OTG Capability
• Reverse Boost Support, Up to 900mA at +5V
• Programmable Reverse Boost Output Voltage
(Up to 5.8V)
●● Flexible Programmability
• I2C 2.0 Serial Interface
●● Compact Package
• 3.64mm x 3.24mm WLP, 8 x 7 Array, 56-Bumps,
0.4mm Pitch
Applications
●● Smartphone and Tablets
●● Other Li-Ion Battery Power Handheld Devices
Ordering Information appears at end of data sheet.
19-8316; Rev 0; 12/15
1 page  
MAX77829
Companion PMIC for Smartphone and Tablet
Electrical Characteristics (continued)
(VDC = 5V, CBYP = 2.2µF, CPVL = CAVL = 10µF, CSYS = 10µF, CMBAT = 4.7µF, TA = -40°C to +85°C, unless otherwise noted. Typical
values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Charge Current
Termination Threshold
Range
IDONE
I2C programmable, see
ITOPOFF[2:0]. IDONE
current independent of
JEITA functionality
Minimum
Maximum
Step size
50
400 mA
50
Charge Current
Termination Deglitch Time
2mV overdrive
16 ms
Charge Current
Termination Accuracy
VICHG
VICHG Output Voltage
CHARGER TIMER
Dead-Battery and
Precharge Time
Fast-Charge Time Range
Fast-Charge Timer
Accuracy
Top-Off Time
Top-Off Timer Accuracy
Timer Extend Current
Threshold
REVERSE BOOST
BYP Reverse Boost
Voltage Adjustment
Range
Reverse Boost Quiescent
Current
Reverse Boost Voltage
Accuracy
Reverse Boost Converter
Maximum Output Current
IDONE = 200mA
IDONE = 50mA
VICHG_GAIN = 0,
1.41mV/mA
IOUT = 50mA
IOUT = 1000mA
IOUT = 1500mA
tPRECHG
tFCHG
USB 500mA mode (tPRECHG_500)
USB 100mA mode (tPRECHG_100)
I2C programmable, refer
to FCHGTIME[2:0] for
detailed values
Minimum
Maximum
Default 5 hours setting
tTOPOFF
I2C programmable
(See the TOPOFFT[2:0])
Minimum
Maximum
Step size
Default 30 minute setting
Percentage of fast-charge current below which
the timer clock operates at half-speed (when
JEITA is enabled)
Programmable with
RBOUT[3:0], 2.6V < VSYS
< VBYP - 0.5V
Minimum
Maximum
Step size
Switching
5.1V setting, 0mA < ILOAD < 500mA
VSYS = 3.7V(minimum required SYS voltage to
guarantee the boost output current)
180
35
1260
4.94
1500
70.5
1410
2150
14
39
4
16
5
0
60
10
20
50
3.0
5.8
0.025
2.1
5.1
224
mA
70
1540
mV
16
min
45
hour
6 hour
min
%
%
V
5.36
mA
V
mA
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX77829
Companion PMIC for Smartphone and Tablet
White LED Backlight Driver
(VSYS = 3.7V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
STEP-UP WLED DRIVER
Input Voltage Range
Step-Up Converter
Quiescent Current
No switching, includes 20µA for each current
source
Step-Up Converter
Shutdown Current
VSYS = 5.2V, All current sources disabled
Current Source
Quiescent Current
VWLEDOUT = 20V, change in quiescent current
when 1 current source is enabled or disabled
Step-Up Converter
Switching Frequency
BSTEN = 1, LEDPWM duty WLEDFOSC = 00
cycle > 0
WLEDFOSC = 11
Maximum Duty Cycle
WLEDFOSC[1:0] =11
Soft-Start Duration
Output Voltage Range
Overvoltage Protection
Threshold
WLEDOVP = 1
MIN
2.5
93
VBAT
34.1
TYP
200
20
0.667
1
10
WLEDOUT Leakage
Current
Current Source Linear
Output Range
VWLEDOUT = 5.5V, VSYS
= 5.2V, boost in shutdown
(Note 3)
TA = +25°C
TA = +25°C
VWLEDOUT = 35V, VWLEDLX = 35V, boost in
shutdown
8-bit linear dimming range (97.656µA/LSB)
0.12
2
25
0
Current Source Dropout
Voltage
WLED Current Accuracy
WLED Current Matching
WLED Leakage Current
in shutdown
WLEDLX Leakage
Current
N-Channel On-
Resistance
IWLED_ = 25mA (programmed), (VWLED_
- VWLEDGND) measured when ILED_ has
dropped to 90% of full-scale programmed level,
VWLEDOOUT = 20V, TA = +25°C
IWLED_ = 25mA, VWLED_ = 0.5V above
VWLEDGND, VWLEDOUT = 20V, TA = +25°C
Mismatch between WLED1 and WLED2,
IWLED_ = 25mA, (VWLED - VWLEDGND) = 0.5V,
VWLEDOUT = 20V, TA = +25°C
VWLEDOUT = 35V,
VWLED_ = 35V
VWLEDLX = 35V,
VWLEDOUT = 35V
TA = +25°C
TA = +85°C
TA = +25°C
TA = +85°C
IWLEDLX = 175mA
-1
-1
-5
100
0.1
1
+0.1
1
400
MAX UNITS
VOVLO
V
µA
1 µA
µA
MHz
%
V/ms
35 V
µA
µA
µA
25 mA
180 mV
+1 %
+1 %
1 µA
µA
+5 µA
µA
mΩ
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX77829.PDF ] | |
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