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PDF RT5002C Data sheet ( Hoja de datos )
| Número de pieza | RT5002C | |
| Descripción | 7 + 1 Channel DC/DC PMU | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT5002C
7 + 1 Channel DC/DC PMU with Li-Ion Battery Charger for DSC
General Description
The RT5002C is a complete power supply solution for
digital still cameras and other handheld devices. It includes
a 7+1 channel DC/DC power converter unit, a single-cell
Li-ion battery charger, and an I2C control interface.
The power converter unit includes one synchronous step-
up converter and three synchronous step-down converters
for DSP core, I/O, Motor, and memory power supply, one
synchronous high voltage step-up converter and one
asynchronous inverting converter for CCD± bias, one
WLED driver in either synchronous high voltage step-up
or current source operation, and one low quiescent LDO
for RTC application. All converters are internally frequency
compensated and integrate power MOSFETs. The power
converter unit provides complete protection functions: over
current, thermal shutdown, over voltage, over-load, and
under voltage protection.
The battery charger includes Auto Power Path
Management (APPM). No external MOSFETs are required.
The charger enters sleep mode when power is removed.
Charging tasks are optimized by using a control algorithm
to vary the charge rate, including pre-charge mode, fast
charge mode and constant voltage mode. The charge
current can also be programmed with an external resistor
and modified via the I2C control interface. The scope that
the battery regulation voltage can be modified via the I2C
interface depends on the battery temperature. The internal
thermal feedback circuitry regulates the die temperature
to optimize the charge rate for all ambient temperatures.
The charging task will always be terminated in constant
voltage mode when the charging current reduces to the
termination current of 10% x ICHG_FAST. The charger
includes under voltage and over-voltage protection for the
supply input voltage, VIN.
Features
Power Converter Unit :
One Channel LV Sync Step-Up and Three Channel
LV Sync Step-Down
Up to 95% Efficiency
One Sync Step-Up and One Async Inverting for
CCD± bias
One WLED Driver in either Sync Step-Up or Current
Source Operation
WLED Driver with Dimming Control
Step-Up Mode with LED Open Protection (OVP7)
One Low Quiescent LDO with Reverse Leakage
Prevention for RTC Power Supply
Preset On/Off Sequence of CH1, CH2, CH3, CH4
(1 → 3 → 4 → 2)
Three Preset On/Off Sequences of CH5, CH6 (5 → 6,
6 → 5, and 5/6 at the same time)
Simplified Application Circuit
Input Power
Chip Enable
I2C Control
VIN SYS
RT5002C
PVD1
LX2
EN1234
LX3
LX4
PVD5
SCL
SDA
VOUT6
PVD7
RTCPWR
GND BAT
System Power
Step-Up For Motor
Step-Up/Down for I/O
Step-Down for DDR II
Step-Down for Core
HV Step-Up for CCD
HV Inverting for CCD
Step-Up for LED Backlight
LDO for RTC
Battery
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5002C-00 January 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT5002C
Function Block Diagram
VDDM
EN1234
SCL
SDA
VOUT5
LX5
FB5
PVD6
LX6
VOUT6
FB6
PVD7
LX7
Power On/Off Sequence
Control
I2C Interface Register File
PVD6
Body
Diode
Control
VDDM
CH5
C-Mode
Step-Up
1.25V
REF
-
+
EN56
VDDM
CH6
Async
Inverting
SYS
UVLO
SS VDDI
UVLO
VDDM
CH1
C-Mode
Step-Up
Body SYS
Diode
Control
VDDM
-
+
0.8V
REF
CH2
C-Mode
Step-Down
0.6V REF
PVD6
Body
Diode
Control
- EN56
+
VDDM
CH7
Step-Up or
Current Source
+
31 Level Dimming
VDDM
-
+
0.8V
REF
CH3
C-Mode
Step-Down
PVD1
LX1
FB1
PVD2
LX2
FB2
PVD3
LX3
FB7
VREF
TSSEL
VIN
SYS
BAT
TS
VP
ISETA
CHG
INT
1.8V
REF
Li+ Battery
Charger with
APPM
Interrupt Handler
EN7 VREF
VDDM
-
+
0.8V
REF
EN7_DIM7
ENCH
USUS
VSET
ISETL
ISETU
ISET
TIMER
SAFE
EOC
TS_FAULT
PGOOD
SAFE
NoBAT
CH4
C-Mode
Step-Down
-
+ 0.8V
REF
VDDI
RTC_LDO
w / Body Diode Control
VIN Power Plug-In
BAT Wake Up Detector
FB3
PVD4
LX4
FB4
GND
RTCPWR
WAKE
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5002C-00 January 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT5002C
Parameter
Symbol
Test Conditions
Min Typ
Max Unit
Control
EN1234, TSSEL
Input Voltage
Threshold
Logic-High
Logic-Low
1.3 --
-- --
--
V
0.4
EN1234, TSSEL Sink Current
-- 1
6 μA
Thermal Protection
Thermal Shutdown
Thermal Shutdown Hysteresis
RTC LDO
TSD
ΔTSD
-- 155
-- 20
-- °C
-- °C
Standby Current
VDDM = 4.2V
-- 3
6 μA
VOUT (RTCPWR)
Max Output Current
(Current Limit)
Dropout Voltage
IOUT = 0mA, VDDM = 4.2V
VDDM = 4.2V
IOUT = 50mA
IOUT = 10mA
IOUT = 3mA
3
60
--
--
--
3.05
130
--
--
--
3.1
200
1000
150
60
V
mA
mV
WAKE Up Detector
WAKE Impulse High Duration
WAKE Output
High Level
Low Level
VIN Threshold to Wake Up
tWAKEUP
VIN or BAT plug in,
RTCPWR = 3.05V
VWAKE_H
Source Current 0.5mA,
RTCPWR = 3.05V
VWAKE_L
Sink Current −0.5mA,
RTCPWR = 3.05V
RTCPWR = 3.05V
-- 90
-- ms
--
RTCPWR
− 0.3
RTCPWR
V
0 0.3
--
3.6 3.8
4V
BAT Threshold to Wake Up
-- 3
-- V
BAT Threshold Hysteresis to Wake Up
-- 200
-- mV
Charger Unit : (VIN = 5V, VBAT = 4V, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Supply Input
VIN Under Voltage Lockout
Threshold
VIN Under Voltage Lockout
Hysteresis
VUVLO
ΔVUVLO
VIN = 0V to 5V
VIN = 5V to 0V
3.6 3.8
4
V
-- 240 -- mV
VIN Supply Current
VIN Suspend Current
VIN − BAT VOS Rising
VIN − BAT VOS Falling
ISUPPLY
ISYS = IBAT = 0mA, ENCH = 1
(VBAT > VREGx)
--
1
2
mA
ISYS = IBAT = 0mA, ENCH = 0
(VBAT > VREGx)
--
0.8 1.5
IUSUS
VIN = 5V, USUS = 1
-- 195 300 μA
VOS_H
-- 200 300 mV
VOS_L
10 50 -- mV
Voltage Regulation
System Regulation Voltage
VSYS
ISYS = 800mA
4.4 4.5 4.6
V
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5002C-00 January 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RT5002C.PDF ] | |
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