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PDF RT8966H Data sheet ( Hoja de datos )
| Número de pieza | RT8966H | |
| Descripción | Mini Analog Baseband Power Management IC | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT8966H
Mini Analog Baseband Power Management IC
General Description
The RT8966H is an analog subsystem which includes a
linear charger, 4 LDOs, a 4-CH current source, and a
multiplexer for USB, UART, microphone, stereo and audio
on a single mini/micro USB connector.
The RT8966H adopts an I2C bus for control and uses an
internal method to determine the connected device.
The USB input provides high speed USB connection. The
audio inputs feature negative rail signal operation to realize
simple DC coupled headset speakers. The RT8966H
provides an internal device detection method by using the
USB ID signal pin and the VBUS voltage. The resistor
values and VBUS voltage determine the unique detection
method of each accessory. The host microprocessor
adopts I2C to control the switch position and read the
results of the accessory detection. The RT8966H can also
detect USB chargers, including dedicated chargers (D+/
D− shorted) and high, power, host/hub chargers.
The RT8966H has a linear charger with maximum 1A
current capability. The charging current and end of charge
current can be controlled by I2C interface. It also provides
a 50mA LDO to support the power of the peripheral circuit.
In factory mode, the RT8966H provides 4.35V/2.3A power
to support system operation.
The RT8966H is available in a thin WQFN-32L 4x4 package.
Features
Hi-Speed USB Operation
Interrupt for Device Insertion and Removal
Interrupt for SEND/END Button Detection
Interrupt for Protection Function
Low Power Microphone Standby Mode
Default Startup Mode for Factory Support
Negative Rail Audio Signal Paths
Internal LDO for Low Noise Microphone Bias
28V Maximum Rating for DC Adapter
Internal Integrated Power MOSFETs of Charger
Support 4.35V/2.3A Factory Mode
I2C Controlled Interface
4 Current Sources with 32-Steps Current Setting
4 LDOs with Programmable Output Voltage
Thin 32-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
Cellular Phone
Smart Handheld Device
Marking Information
0Y= : Product Code
0Y=YM
DNN
YMDNN : Date Code
Ordering Information
RT8966H
Package Type
QW : WQFN-32L 4x4 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
OUT1
OUT2
VIN
OUT3
OUT4
GND
LED1
LED2
32 31 30 29 28 27 26 25
1 24
2 23
3 22
4
GND
21
5 20
6 33 19
7 18
8 17
9 10 11 12 13 14 15 16
VBUS
VBUS
D-
D+
ID
RES
CAP
MIC
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8966H-00 July 2015
WQFN-32L 4x4
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT8966H
Absolute Maximum Ratings (Note 1)
VBUS ----------------------------------------------------------------------------------------------------------------- −0.3V to 28V
All Other Inputs ----------------------------------------------------------------------------------------------------- −0.3V to (VIN + 0.3V)
Power Dissipation, PD @ TA = 25°C
WQFN-32L 4x4 ----------------------------------------------------------------------------------------------------- 3.59W
Package Thermal Resistance (Note 2)
WQFN-32L 4x4, θJA ------------------------------------------------------------------------------------------------ 27.8°C/W
WQFN-32L 4x4, θJC ----------------------------------------------------------------------------------------------- 7°C/W
Junction Temperature ---------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------ 260°C
Storage Temperature Range ------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) --------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ---------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Battery Supply Voltage Range, VBAT ------------------------------------------------------------------------- 2.8V to 5.5V
USB Supply Voltage Range, VBUS ---------------------------------------------------------------------------- 4.3V to 6.7V
Junction Temperature Range ------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VBAT = 3.7V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
DC Characteristics
VBUS OVP Threshold
Voltage
VOVP
VBUS UVP Threshold
Voltage
VUVP
OTP
(Note 5)
OTP Hysteresis
(Note 5)
Test Conditions
Min Typ Max Unit
6.7 6.9 7.1
3.5 3.7 3.9
-- 135 --
-- 10 --
V
V
°C
°C
Internal Switch
Supplies
VBAT UVLO
ID LDO Voltage
ID LDO PSRR
ID LDO Noise
VBAT Supply PSRR
VSW POS
VSW NEG
VUVLO_BAT
VLDO
PSRRLDO
NLDO
PSRRVBAT
(Note 5)
--
(Note 5)
VBAT = 3.5V
I2C bit : VLDO = 0
I2C bit : VLDO = 1
VLDO = 1, VBAT = 3.3 0.2V, f = 217Hz,
IID = 100A (Note 5)
ID_2P2 = 1, MICLP = 0, f = 400Hz to 4kHz,
ILOAD = 100A (Note 5)
Noise from VBAT to D-, D+, or ID, RL = 50;
f = 10kHz, VBAT = 3.5 0.2V (Note 5)
--
2.1
2.5
2.2
--
--
--
3.4
1.9
2.5
2.6
2.3
90
5
80
--
V
--
2.8 V
2.7
V
2.4
-- dB
-- VRMS
-- dB
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8966H-00 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
Application Information
Charger Description
The RT8966H integrates a single-cell Li-ion battery charger
IC with pre-charge mode, a fast charge mode (constant
current mode) or constant voltage mode. The charge
current is programmable via the I2C interface as shown in
the control register address tables, CHG_Ctrl1 and
CHG_Ctrl2. The CV mode voltage is fixed at 4.35V. The
pre-charge threshold is fixed at 2.6V. If the battery voltage
is below the pre-charge threshold, the RT8966H charges
the battery with a trickle current until the battery voltage
rises above the pre-charge threshold. The RT8966H is
capable of being powered up from AC adapter and USB
(Universal Serial Bus) port inputs. Moreover, the RT8966H
includes a linear regulator (LDO 4.9V, 50mA) for supplying
low power external circuitry.
Charger Over Voltage Protection
The input voltage is monitored by the internal comparator
and the input over voltage protection threshold is set to
6.9V. However, input voltage over 28V will still cause
damage to the RT8966H. When the input voltage exceeds
the threshold, the comparator outputs a logic signal to
turn off the power P-MOSFET to prevent high input voltage
from damaging the electronics in the handheld system.
When the input over voltage condition is removed, the
comparator re-enables the output by running through soft-
start.
Battery Charge Profile
Pre-Charge Mode :
Figure 1 shows the RT8966H charging state of the charging
function. During a charge cycle, if the battery voltage is
below the VPRECH threshold (typical value is 2.6V), the
charger enters pre-charge mode. This feature revives
deeply discharged cells and protects battery life. The pre-
charge current has a typical value of 50mA.
Constant Current Mode :
Once the battery voltage is higher than 2.6V, the charger
enters the constant current stage. The constant current
level can be programmed from 90mA to 1A via the I2C
compatible interface but the default value is 400mA.
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8966H-00 July 2015
RT8966H
Constant Voltage Mode :
Once the battery voltage level closes in at 4.35V, the
charger enters constant voltage phase and the charging
current begins to decrease. When the charging current
becomes lower than IEOC (end of charge current), the loop
enters charge done mode.
The RT8966H will then send an interrupt and register CHG
bit, as shown in Table 10. Finally, INT_STA2 becomes 0
to indicate that the RT8966H has completed the charging.
Recharge Phase :
When any loading or event causes VBAT to drop or battery
to discharge, the charger will automatically jump to the
appropriate mode to recharge the battery.
Pre-charge
Mode
Constant
Current
Mode
Battery
Charge
Current
Programmed
Charge
Current
Constant
Voltage
Mode
4.35V
Battery
Regulation
Voltage
threshold
Precharge
Threshold
Battery
Full
CHG pull
High
Recharge
Phase
Time
Figure 1. Charging State of the Charger Function
Charger for Factory Mode
The RT8966H provides factory mode for supplies up to
2.3A for powering external loads with no battery installed
and VBAT is regulated to 4.35V. The factory mode allows
the user to supply system power with no battery
connected. It is programmable by I2C via the PTM bit, as
shown in Table 13.
In factory mode, thermal regulation is disabled, but thermal
protection (135°C) is still active. When using currents
greater than 1.5A in factory mode, the user must limit the
duty cycle at the maximum current to 20% with a
maximum period of 10ms.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RT8966H.PDF ] | |
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