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| 型號： | PWL6030B1A0CMR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA187 |
| 封裝： | 7 X 7 MM, 0.40 MM PITCH, GREEN, FCBGA-187 |
| 文件頁數(shù)： | 31/97頁 |
| 文件大小： | 937K |
| 代理商： | PWL6030B1A0CMR |
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SWCS045B
– SEPTEMBER 2010 – REVISED JUNE 2011
16 Hz for the analog vibrator
The clock generator delivers the following clock from the 32-kHz multiplexer output (RC32K or OSC32K): 32 kHz
for the gas gauge.
NOTE
The 3-MHz charger clock is directly generated in the charger module and not from the
common clock generator.
POWER RESOURCES
The power resources provided by the TWL6030 device include inductor-based SMPSs and linear LDO voltage
regulators. These supply resources provide the required power to the external processor cores and external
components as well as to the modules embedded in the TWL6030 device.
Short-Circuit Protection
The short-circuit current limits for all LDOs and SMPS regulators embedded in the TWL6030 device are
approximately twice their respective maximum load current. For specific LDO use cases, when the output of the
module is shorted to ground, the power dissipation can exceed the 1.7-W power dissipation requirement, if there
is no continuous preventive action engaged.
The short-circuit protection scheme compares an LDO/SMPS output voltage to a reference voltage and detects a
short circuit if the regulator voltage drops slightly below its minimum output voltage (1 V for the LDO and 0.55 V
for the SMPS). A short-circuit protection scheme is included in each power resource of the TWL6030 device to
ensure that, if the output of an LDO or SMPS is short-circuited, the power dissipation does not increase
drastically.
All LDOs/SMPSs include this short-circuit protection that monitors the regulator output voltage and generates an
interrupt when a short circuit is detected (see interrupt mapping). The VRTC regulator is the unique power
resource that cannot generate an interrupt when shorted. Therefore, this regulator includes a different analog
short-circuit mechanism that does not require a switch off of the regulator.
The TWL6030 device waits for the application processor to clear the short-circuit interrupt and turn off the
associated power resource within the 10-ms default time. The short-circuit counter is configurable with 6 EPROM
bits loaded during the power-up sequence. The possible programming range is 0
–640 ms in 10-ms steps. If the
interrupt is not cleared before the counter expires, the TWL6030 device switches off automatically. In parallel, the
primary watchdog can shut down the device, if the watchdog expires.
In normal use conditions, when the TWL6030 device is turned off, all LDO/SMPS resources (except
VRTC/VBRTC) are turned off and their corresponding short-circuit mechanisms are reset. If a short-circuit
condition persists in which all power resources should normally be off, the TWL6030 device does not power up
again.
SMPS Regulators
The TWL6030 device includes seven SMPSs. Three of these SMPSs have DVS capability and are SmartReflex
class 3 compatible. These three SmartReflex SMPSs provide independent core voltage domains to the host
processor. The four remaining SMPSs provide supply voltages for the host processor I/Os. Each SMPS is a
high-frequency, synchronous, step-down DCDC converter allowing the use of low-cost chip inductors and
capacitors.
Each SMPS operates at 6-MHz fixed-switching frequency and enters the power-save mode operation at light
load currents to maintain high efficiency over the entire load current. The PFM mode extends the battery life by
reducing the quiescent current to 30
A (typical) during light load and standby operation. For noise-sensitive
applications, the required SMPS can be forced into fixed-frequency PWM mode. In shutdown mode, the current
consumption is reduced to less than 1
A.
Copyright
2010–2011, Texas Instruments Incorporated
37
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