Switching Charger. PSC5415A Datasheet

PSC5415A Charger. Datasheet pdf. Equivalent


Prisemi PSC5415A
PSC5415A
USB-Compliant Single-Cell Li-lon Switching Charger with USB-OTG Boost Regulator
Description
The PSC5415A combines a highly integrated switch-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time
from a USB power source, and a boost regulator to power a USB peripheral from the battery.
The charging parameters and operating modes are programmable through an I2C interface. The charger and boost regulator
circuits switch at 1.5MHz to minimize the size of external passive components.
The PSC5415A provides battery charging in three phases: conditioning, constant current, and constant voltage.
To ensure USB compliance and minimize charging time, the input current is limited to the value set through the I2C host.
Charge termination is determined by 1/10 of the setting current.
The integrated circuit (IC) automatically restarts the charge cycle when the battery falls below an internal threshold. If the
input source is removed, the IC enters a high-impedance mode with leakage from the battery to the input prevented. Charge
status is reported back to the host through the I2C port.
The PSC5415A can operate as a boost regulator on command from the system. The boost regulator includes a soft-start that
limits inrush current from the battery.
The PSC5415A is available in a 2.0 x 1.7mm, 20-bump, 0.4mm pitch WLCSP package.
VAUX
VBUS
CBUS
1μF
VBUS
CMID 10μF PMID
SW
BOOT
10KΩ 10KΩ 10KΩ
10KΩ
10KΩ
PSC5415A CSIN
SCL
SDA
STAT
VBAT
VREF
OTG
DISABLE
PGND
HOST
L1
Cboot
100nF
1μH RSNS
CCSIN
0.1μF
BATTERY
CBAT
22μF
CREF
CCSOUT
1μF 0.1μF
Figure 1: Typical Application
Feature
Fully Integrated, High-Efficiency Charger for Single-Cell
Li-lon and Li-Polymer Battery Packs
Faster Charging than Linear
Charge Voltage Accuracy: ±0.5% 25
±5% Charge Current Regulation Accuracy
20V Absolute Maximum Input Voltage
6V Maximum Input Operating Voltage
1.5A Maximum Charge Rate
Application
Cellular Phones, Smart Phones, PDAs
Tablet, Portable Media Players
Gaming Device, Digital Cameras
Rev.06.121www.prisemi.com


PSC5415A Datasheet
Recommendation PSC5415A Datasheet
Part PSC5415A
Description USB-Compliant Single-Cell Li-lon Switching Charger
Feature PSC5415A; PSC5415A USB-Compliant Single-Cell Li-lon Switching Charger with USB-OTG Boost Regulator Description.
Manufacture Prisemi
Datasheet
Download PSC5415A Datasheet




Prisemi PSC5415A
PSC5415A
USB-Compliant Single-Cell Li-lon Switching Charger with USB-OTG Boost Regulator
Programmable through I2C Interface:
-Input Current
-Fast-Charge/Termination Current
-Charger Voltage
-Termination Enable
1.5MHz Synchronous Buck PWM Controller with
WideDutyCycleRange
Small Footprint 1μH External Inductor
Weak Input Sources Accommodated by Reducing
Charging Current to Maintain Minimum VBUS Voltage
Low Reverse Leakage to Prevent Battery Drain to VBUS
5V, 500mA Boost Mode for USB OTG for 3.0 to 4.5V
Battery Input
Recommended External Components
Component
L1
(Ich<=1.5A)
Description
1.0uH, 20%, 2.3A
2.0mm*1.6mm*0.9mm
CBAT
CMID
CBUS
22μF,10%,6.3V,X5R,0603
10μF,10%,6.3V,X5R,0603
1.0μF,10%,25V,X5R,0603
Vendor
Murata:LQM2MPN1R0
Murata: GRM188R60J226M
Parameter Typ. Units
L 1.0 μH
DCR(Series R) 80
C 22 μF
Murata: GRM185R60J106M
C 10 μF
Murata: GRM188R61E105M
C 1.0 μF
Pin Configuration
A1 A2 A3 A4
B1 B2 B3 B4
A4 A3 A2 A1
B4 B3 B2 B1
C1 C2 C3 C4
C4 C3 C2 C1
D1 D2 D3 D4
D4 D3 D2 D1
E1 E2 E3
Top View
E4 E4
Figure 3: WLCSP-20 Pin Assignments
E3 E2 E1
Bottom View
Rev.06.122www.prisemi.com



Prisemi PSC5415A
PSC5415A
USB-Compliant Single-Cell Li-lon Switching Charger with USB-OTG Boost Regulator
Pin Definitions
Pin#
A1,A2
A3
A4
B1-B3
B4
C1-C3
C4
D1-D3
D4
E1
E2
Name
Description
VBUS
BOOT
SCL
PMID
SDA
SW
STAT
Charger Input Voltage and USB-OTG output voltage. Bypass with a 1μF capacitor to PGND
Boost strap capacitor connection for high side NMOS gate driver. Connect 33nF~100nF
ceramic capacitor (voltage rating ≥ 10V) from BOOT to SW pin.
I2C Interface Serial Clock. This pin should not be left floating.
Power Input Voltage. Power input to the charger regulator, bypass point for the input current
sense, and high-voltage input switch. Bypass with a minimum of 4.7μF, 6.3V capacitor to PGND.
I2C Interface Serial Data. This pin should not be left floating.
Switching Node. Connect to output inductor.
Status. Open-drain output indicating charge status. The IC pulls this pin LOW when charge is in
process.
PGND
OTG
CSIN
Power Ground. Power return for gate drive and power transistors. The connection from this pin to
the bottom of CMID should be as short as possible.
On-The-Go. Enables boost regulator in conjunction with OTG_EN and OTG_PL bits (see
Table 16).
Current-Sense Input. Connect to the sense resistor in series with the battery. The IC uses
this node to sense current into the battery. Bypass this pin with a 0.1μF capacitor to PGND.
Charge Disable. If this pin is “1”, charging is disabled. When LOW, charging is controlled by I2C
DISABLE
registers.
Bias voltage. Connect to a 1uF capacitor to PGND. The output voltage is PMID, which is limited
E3 VREF
to6.5V. Any resistor loading to VREF is NOT recommended.
Battery Voltage. Connect to the positive (+) terminal of the battery pack. Bypass with a 0.1μF
E4 VBAT
capacitor to PGND if the battery is connected through long leads.
Rev.06.123www.prisemi.com







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